As a hardcore player, let me share my humble opinion.

1. The fundamental reason lies in the success of the game itself. Only with a large number of players can Tieba become popular.

2. Due to historical reasons, political reasons, psychological reasons, XXXXX... the national server version is seriously lagging behind (it is much better now) accumulated from the 40s, 50s, 60s and 70s. A forum formed spontaneously by a strong group of players started by discussing dungeon details and game issues, and gradually incorporated many elements of life. Gradually, as the original players grew up and started working, the content of the Tieba became richer.

3. Still due to game problems and various man-made reasons, Tieba is a place for players to vent their dissatisfaction, so it is very popular.