Where is the first chapter of shushan to cultivate fine dandan?

Sect alchemy room.

There is an introduction in official website's gameplay, a game of Shushan. In the early chapter of Shushan, Dandanfang was located in the alchemy room of the sect.

Shushan: The first chapter is the cross-platform (PC, mobile terminal, Switch) open world game developed by Paris Studio for many years.