Although LOL's American clothes and national clothes are made by fist companies. However, the US service is directly operated by the fist company, and the national service is operated by Tencent. When logging in to the game, you need a fist account to log in to the American service, while the national service needs a QQ number.
Although it was developed by a game company, it belongs to two systems. Except for the gameplay, all the assets in the game are disconnected, so there will be no conflict.