diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index cc30c77a2..a02a500c7 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -440,13 +440,14 @@ basicGroupFullInfo description:string creator_user_id:int32 members:vector<chatM
 //@date Point in time (Unix timestamp) when the current user joined, or the point in time when the supergroup or channel was created, in case the user is not a member
 //@status Status of the current user in the supergroup or channel
 //@member_count Member count; 0 if unknown. Currently it is guaranteed to be known only if the supergroup or channel was found through SearchPublicChats
+//@has_linked_chat True, if the channel has a discussion supergroup, or the supergroup is a discussion supergroup for a channel
 //@sign_messages True, if messages sent to the channel should contain information about the sender. This field is only applicable to channels
 //@is_channel True, if the supergroup is a channel
 //@is_verified True, if the supergroup or channel is verified
 //@restriction_reason If non-empty, contains the reason why access to this supergroup or channel must be restricted. Format of the string is "{type}: {description}".
 //-{type} Contains the type of the restriction and at least one of the suffixes "-all", "-ios", "-android", or "-wp", which describe the platforms on which access should be restricted. (For example, "terms-ios-android". {description} contains a human-readable description of the restriction, which can be shown to the user)
 //@is_scam True, if many users reported this supergroup as a scam
-supergroup id:int32 username:string date:int32 status:ChatMemberStatus member_count:int32 sign_messages:Bool is_channel:Bool is_verified:Bool restriction_reason:string is_scam:Bool = Supergroup;
+supergroup id:int32 username:string date:int32 status:ChatMemberStatus member_count:int32 has_linked_chat:Bool sign_messages:Bool is_channel:Bool is_verified:Bool restriction_reason:string is_scam:Bool = Supergroup;
 
 //@description Contains full information about a supergroup or channel
 //@param_description Supergroup or channel description
@@ -454,6 +455,7 @@ supergroup id:int32 username:string date:int32 status:ChatMemberStatus member_co
 //@administrator_count Number of privileged users in the supergroup or channel; 0 if unknown
 //@restricted_count Number of restricted users in the supergroup; 0 if unknown
 //@banned_count Number of users banned from chat; 0 if unknown
+//@linked_chat_id Chat identifier of a discussion supergroup for the channel, or a channel, for which the supergroup is a discussion supergroup; 0 if none
 //@can_get_members True, if members of the chat can be retrieved
 //@can_set_username True, if the chat can be made public
 //@can_set_sticker_set True, if the supergroup sticker set can be changed
@@ -463,7 +465,7 @@ supergroup id:int32 username:string date:int32 status:ChatMemberStatus member_co
 //@invite_link Invite link for this chat
 //@upgraded_from_basic_group_id Identifier of the basic group from which supergroup was upgraded; 0 if none
 //@upgraded_from_max_message_id Identifier of the last message in the basic group from which supergroup was upgraded; 0 if none
-supergroupFullInfo description:string member_count:int32 administrator_count:int32 restricted_count:int32 banned_count:int32 can_get_members:Bool can_set_username:Bool can_set_sticker_set:Bool can_view_statistics:Bool is_all_history_available:Bool sticker_set_id:int64 invite_link:string upgraded_from_basic_group_id:int32 upgraded_from_max_message_id:int53 = SupergroupFullInfo;
+supergroupFullInfo description:string member_count:int32 administrator_count:int32 restricted_count:int32 banned_count:int32 linked_chat_id:int53 can_get_members:Bool can_set_username:Bool can_set_sticker_set:Bool can_view_statistics:Bool is_all_history_available:Bool sticker_set_id:int64 invite_link:string upgraded_from_basic_group_id:int32 upgraded_from_max_message_id:int53 = SupergroupFullInfo;
 
 
 //@class SecretChatState @description Describes the current secret chat state
diff --git a/td/generate/scheme/td_api.tlo b/td/generate/scheme/td_api.tlo
index 2a50a7842..9b638e0fa 100644
Binary files a/td/generate/scheme/td_api.tlo and b/td/generate/scheme/td_api.tlo differ
diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index 150cc4dd9..503925124 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -2686,6 +2686,7 @@ void ContactsManager::Channel::store(StorerT &storer) const {
   STORE_FLAG(have_default_permissions);
   STORE_FLAG(is_scam);
   STORE_FLAG(has_cache_version);
+  STORE_FLAG(has_linked_channel);
   END_STORE_FLAGS();
 
   store(status, storer);
@@ -2746,6 +2747,7 @@ void ContactsManager::Channel::parse(ParserT &parser) {
   PARSE_FLAG(have_default_permissions);
   PARSE_FLAG(is_scam);
   PARSE_FLAG(has_cache_version);
+  PARSE_FLAG(has_linked_channel);
   END_PARSE_FLAGS();
 
   if (use_new_rights) {
@@ -6570,6 +6572,9 @@ void ContactsManager::update_chat_full(ChatFull *chat_full, ChatId chat_id) {
 void ContactsManager::update_channel_full(ChannelFull *channel_full, ChannelId channel_id) {
   CHECK(channel_full != nullptr);
   if (channel_full->is_changed) {
+    if (channel_full->linked_channel_id.is_valid()) {
+      td_->messages_manager_->force_create_dialog(DialogId(channel_full->linked_channel_id), "update_channel_full");
+    }
     if (channel_full->participant_count < channel_full->administrator_count) {
       channel_full->administrator_count = channel_full->participant_count;
     }
@@ -6863,7 +6868,8 @@ void ContactsManager::on_get_chat_full(tl_object_ptr<telegram_api::ChatFull> &&c
 
     // Ignoring channel_full->photo
 
-    if (!have_channel(channel_id)) {
+    auto c = get_channel(channel_id);
+    if (c == nullptr) {
       LOG(ERROR) << channel_id << " not found";
       return;
     }
@@ -6907,13 +6913,10 @@ void ContactsManager::on_get_chat_full(tl_object_ptr<telegram_api::ChatFull> &&c
 
       channel->is_changed = true;
 
-      if (participant_count != 0) {
-        auto c = get_channel(channel_id);
-        if (c != nullptr && c->participant_count != participant_count) {
-          c->participant_count = participant_count;
-          c->need_send_update = true;
-          update_channel(c, channel_id);
-        }
+      if (participant_count != 0 && c->participant_count != participant_count) {
+        c->participant_count = participant_count;
+        c->need_send_update = true;
+        update_channel(c, channel_id);
       }
     }
 
@@ -6956,6 +6959,18 @@ void ContactsManager::on_get_chat_full(tl_object_ptr<telegram_api::ChatFull> &&c
       on_update_bot_info(std::move(bot_info));
     }
 
+    ChannelId linked_channel_id;
+    if ((channel_full->flags_ & CHANNEL_FULL_FLAG_HAS_LINKED_CHANNEL_ID) != 0) {
+      linked_channel_id = ChannelId(channel_full->linked_chat_id_);
+      auto linked_channel = get_channel_force(linked_channel_id);
+      if (linked_channel == nullptr || c->is_megagroup == linked_channel->is_megagroup ||
+          channel_id == linked_channel_id) {
+        LOG(ERROR) << "Failed to add a link between " << channel_id << " and " << linked_channel_id;
+        linked_channel_id = ChannelId();
+      }
+    }
+    on_update_channel_full_linked_channel_id(channel, channel_id, linked_channel_id);
+
     ChatId migrated_from_chat_id;
     MessageId migrated_from_max_message_id;
 
@@ -8060,6 +8075,55 @@ void ContactsManager::on_update_channel_full_invite_link(
   }
 }
 
+void ContactsManager::on_update_channel_full_linked_channel_id(ChannelFull *channel_full, ChannelId channel_id,
+                                                               ChannelId linked_channel_id) {
+  CHECK(channel_full != nullptr);
+  if (channel_full->linked_channel_id != linked_channel_id) {
+    if (channel_full->linked_channel_id.is_valid()) {
+      // remove link from a previously linked channel_full
+      auto linked_channel = get_channel_force(channel_full->linked_channel_id);
+      if (linked_channel != nullptr && linked_channel->has_linked_channel) {
+        linked_channel->has_linked_channel = false;
+        update_channel(linked_channel, channel_full->linked_channel_id);
+        reload_channel(channel_full->linked_channel_id, Auto());
+      }
+      auto linked_channel_full = get_channel_full(channel_full->linked_channel_id);
+      if (linked_channel_full != nullptr && linked_channel_full->linked_channel_id == channel_id) {
+        linked_channel_full->linked_channel_id = ChannelId();
+        linked_channel_full->is_changed = true;
+        update_channel_full(linked_channel_full, channel_full->linked_channel_id);
+      }
+    }
+
+    channel_full->linked_channel_id = linked_channel_id;
+    channel_full->is_changed = true;
+
+    if (channel_full->linked_channel_id.is_valid()) {
+      // add link from a newly linked channel_full
+      auto linked_channel = get_channel_force(channel_full->linked_channel_id);
+      if (linked_channel != nullptr && !linked_channel->has_linked_channel) {
+        linked_channel->has_linked_channel = true;
+        update_channel(linked_channel, channel_full->linked_channel_id);
+        reload_channel(channel_full->linked_channel_id, Auto());
+      }
+      auto linked_channel_full = get_channel_full(channel_full->linked_channel_id);
+      if (linked_channel_full != nullptr && linked_channel_full->linked_channel_id != channel_id) {
+        linked_channel_full->linked_channel_id = channel_id;
+        linked_channel_full->is_changed = true;
+        update_channel_full(linked_channel_full, channel_full->linked_channel_id);
+      }
+    }
+  }
+
+  Channel *c = get_channel(channel_id);
+  CHECK(c != nullptr);
+  if (linked_channel_id.is_valid() != c->has_linked_channel) {
+    c->has_linked_channel = linked_channel_id.is_valid();
+    c->need_send_update = true;
+    update_channel(c, channel_id);
+  }
+}
+
 void ContactsManager::on_get_dialog_invite_link_info(const string &invite_link,
                                                      tl_object_ptr<telegram_api::ChatInvite> &&chat_invite_ptr) {
   auto &invite_link_info = invite_link_infos_[invite_link];
@@ -10244,6 +10308,7 @@ void ContactsManager::on_chat_update(telegram_api::channel &channel, const char
   bool has_access_hash = (channel.flags_ & CHANNEL_FLAG_HAS_ACCESS_HASH) != 0;
   auto access_hash = has_access_hash ? channel.access_hash_ : 0;
 
+  bool has_linked_channel = (channel.flags_ & CHANNEL_FLAG_HAS_LINKED_CHAT) != 0;
   bool sign_messages = (channel.flags_ & CHANNEL_FLAG_SIGN_MESSAGES) != 0;
   bool is_megagroup = (channel.flags_ & CHANNEL_FLAG_IS_MEGAGROUP) != 0;
   bool is_verified = (channel.flags_ & CHANNEL_FLAG_IS_VERIFIED) != 0;
@@ -10335,8 +10400,10 @@ void ContactsManager::on_chat_update(telegram_api::channel &channel, const char
     c->need_send_update = true;
   }
 
-  if (c->sign_messages != sign_messages || c->is_megagroup != is_megagroup || c->is_verified != is_verified ||
-      c->restriction_reason != restriction_reason || c->is_scam != is_scam) {
+  if (c->has_linked_channel != has_linked_channel || c->sign_messages != sign_messages ||
+      c->is_megagroup != is_megagroup || c->is_verified != is_verified || c->restriction_reason != restriction_reason ||
+      c->is_scam != is_scam) {
+    c->has_linked_channel = has_linked_channel;
     c->sign_messages = sign_messages;
     c->is_megagroup = is_megagroup;
     c->is_verified = is_verified;
@@ -10391,6 +10458,7 @@ void ContactsManager::on_chat_update(telegram_api::channelForbidden &channel, co
   tl_object_ptr<telegram_api::chatBannedRights> banned_rights;  // == nullptr
   on_update_channel_default_permissions(c, channel_id, get_restricted_rights(banned_rights));
 
+  bool has_linked_channel = false;
   bool sign_messages = false;
   bool is_megagroup = (channel.flags_ & CHANNEL_FLAG_IS_MEGAGROUP) != 0;
   bool is_verified = false;
@@ -10413,8 +10481,10 @@ void ContactsManager::on_chat_update(telegram_api::channelForbidden &channel, co
     c->need_send_update = true;
   }
 
-  if (c->sign_messages != sign_messages || c->is_megagroup != is_megagroup || c->is_verified != is_verified ||
-      c->restriction_reason != restriction_reason || c->is_scam != is_scam) {
+  if (c->has_linked_channel != has_linked_channel || c->sign_messages != sign_messages ||
+      c->is_megagroup != is_megagroup || c->is_verified != is_verified || c->restriction_reason != restriction_reason ||
+      c->is_scam != is_scam) {
+    c->has_linked_channel = has_linked_channel;
     c->sign_messages = sign_messages;
     c->is_megagroup = is_megagroup;
     c->is_verified = is_verified;
@@ -10617,7 +10687,7 @@ int32 ContactsManager::get_supergroup_id_object(ChannelId channel_id, const char
     send_closure(G()->td(), &Td::send_update,
                  td_api::make_object<td_api::updateSupergroup>(td_api::make_object<td_api::supergroup>(
                      channel_id.get(), string(), 0, DialogParticipantStatus::Banned(0).get_chat_member_status_object(),
-                     0, false, true, false, "", false)));
+                     0, false, false, true, false, "", false)));
   }
   return channel_id.get();
 }
@@ -10631,10 +10701,10 @@ tl_object_ptr<td_api::supergroup> ContactsManager::get_supergroup_object(Channel
   if (channel == nullptr) {
     return nullptr;
   }
-  return make_tl_object<td_api::supergroup>(channel_id.get(), channel->username, channel->date,
-                                            get_channel_status(channel).get_chat_member_status_object(),
-                                            channel->participant_count, channel->sign_messages, !channel->is_megagroup,
-                                            channel->is_verified, channel->restriction_reason, channel->is_scam);
+  return make_tl_object<td_api::supergroup>(
+      channel_id.get(), channel->username, channel->date, get_channel_status(channel).get_chat_member_status_object(),
+      channel->participant_count, channel->has_linked_channel, channel->sign_messages, !channel->is_megagroup,
+      channel->is_verified, channel->restriction_reason, channel->is_scam);
 }
 
 tl_object_ptr<td_api::supergroupFullInfo> ContactsManager::get_supergroup_full_info_object(ChannelId channel_id) const {
@@ -10646,9 +10716,10 @@ tl_object_ptr<td_api::supergroupFullInfo> ContactsManager::get_supergroup_full_i
   CHECK(channel_full != nullptr);
   return make_tl_object<td_api::supergroupFullInfo>(
       channel_full->description, channel_full->participant_count, channel_full->administrator_count,
-      channel_full->restricted_count, channel_full->banned_count, channel_full->can_get_participants,
-      channel_full->can_set_username, channel_full->can_set_sticker_set, channel_full->can_view_statistics,
-      channel_full->is_all_history_available, channel_full->sticker_set_id, channel_full->invite_link,
+      channel_full->restricted_count, channel_full->banned_count, DialogId(channel_full->linked_channel_id).get(),
+      channel_full->can_get_participants, channel_full->can_set_username, channel_full->can_set_sticker_set,
+      channel_full->can_view_statistics, channel_full->is_all_history_available, channel_full->sticker_set_id,
+      channel_full->invite_link,
       get_basic_group_id_object(channel_full->migrated_from_chat_id, "get_supergroup_full_info_object"),
       channel_full->migrated_from_max_message_id.get());
 }
diff --git a/td/telegram/ContactsManager.h b/td/telegram/ContactsManager.h
index cc27a529b..18c09fa1d 100644
--- a/td/telegram/ContactsManager.h
+++ b/td/telegram/ContactsManager.h
@@ -638,9 +638,10 @@ class ContactsManager : public Actor {
     int32 date = 0;
     int32 participant_count = 0;
 
-    static constexpr uint32 CACHE_VERSION = 1;
+    static constexpr uint32 CACHE_VERSION = 2;
     uint32 cache_version = 0;
 
+    bool has_linked_channel = false;
     bool sign_messages = false;
 
     bool is_megagroup = false;
@@ -680,6 +681,8 @@ class ContactsManager : public Actor {
 
     int64 sticker_set_id = 0;  // do not forget to store along with access hash
 
+    ChannelId linked_channel_id;
+
     MessageId migrated_from_max_message_id;
     ChatId migrated_from_chat_id;
 
@@ -805,6 +808,7 @@ class ContactsManager : public Actor {
   static constexpr int32 CHANNEL_FLAG_HAS_UNBAN_DATE = 1 << 16;
   static constexpr int32 CHANNEL_FLAG_HAS_PARTICIPANT_COUNT = 1 << 17;
   static constexpr int32 CHANNEL_FLAG_IS_SCAM = 1 << 19;
+  static constexpr int32 CHANNEL_FLAG_HAS_LINKED_CHAT = 1 << 20;
 
   static constexpr int32 CHANNEL_FULL_FLAG_HAS_PARTICIPANT_COUNT = 1 << 0;
   static constexpr int32 CHANNEL_FULL_FLAG_HAS_ADMINISTRATOR_COUNT = 1 << 1;
@@ -820,6 +824,7 @@ class ContactsManager : public Actor {
   static constexpr int32 CHANNEL_FULL_FLAG_HAS_FOLDER_ID = 1 << 11;
   static constexpr int32 CHANNEL_FULL_FLAG_CAN_VIEW_STATISTICS = 1 << 12;
   static constexpr int32 CHANNEL_FULL_FLAG_HAS_ONLINE_MEMBER_COUNT = 1 << 13;
+  static constexpr int32 CHANNEL_FULL_FLAG_HAS_LINKED_CHANNEL_ID = 1 << 13;
 
   static constexpr int32 CHAT_INVITE_FLAG_IS_CHANNEL = 1 << 0;
   static constexpr int32 CHAT_INVITE_FLAG_IS_BROADCAST = 1 << 1;
@@ -942,6 +947,8 @@ class ContactsManager : public Actor {
 
   void on_update_channel_full_invite_link(ChannelFull *channel_full,
                                           tl_object_ptr<telegram_api::ExportedChatInvite> &&invite_link_ptr);
+  void on_update_channel_full_linked_channel_id(ChannelFull *channel_full, ChannelId channel_id,
+                                                ChannelId linked_channel_id);
 
   static bool speculative_add_count(int32 &count, int32 new_count);