We're glad to announce that Patch 6726 will be released on June 16th.
Note: You must be sure that the client is completely closed before patching, otherwise the patch may not be installed correctly and you won't be able to login the game.
Highlights of Patch 6726
Offline Event Section Update
Offline Event section will be updated with http://coevent.99.com/worldcup2018/client/
Bug Fix
The wrong item amount left in Bound Item Sales will be fixed.
Update: The patch will be updated on June 18th, sorry for the inconvenience this issue may cause.