Hero Card will have server maintenance on 22 September at 16:00 (UTC+8). The maintenance will take about 60 minutes.

22 Sep 2022, 07:58
Hero Card will have server maintenance on 22 September at 16:00 (UTC+8). The maintenance will take about 60 minutes. The game can not be logged in during maintenance. Sorry for the inconvenience caused! Maintenance will be including: 1. Optimize matchmaking. 2. Fix the problem of Bill selling in TradeMarket. 3. Optimize disconnection issues.

Same news in other sources

1
X World Games
X World GamesXWG #1560
Telegram
23 Sep 2022, 07:04
Hero Card will have server maintenance on 23 September at 16:00 (UTC+8). The maintenance will take about 60 minutes. Please do not match games for 10 minutes before maintenance. To avoid loss of game data during maintenance.The game can not be logged in during maintenance. Sorry for the inconvenience caused! Maintenance will be including: 1.Server Maintenance.
Hero Card will have server maintenance on 23 September at 16:00 (UTC+8). The maintenance will take about 60 minutes.
Hero Card will have server maintenance on 23 September at 16:00 (UTC+8). The maintenance will take about 60 minutes. Please do not match games for 10 minutes before maintenance. To avoid loss of game data during maintenance.The game can not be logged in during maintenance. Sorry for the inconvenience caused! Maintenance will be including: 1.Server Maintenance.