Golden Splendor Immortal City is the most stable, profitable, and enduring industry of Biyun Sect, which should not be abandoned unless facing the Sect's destruction or doubling its profits.
After all, the Immortal City is not only a source of revenue for Biyun Sect but also an effective means to control the entire trade of Cangyun State, managing the economic networks of major powers within the state.
Now that it is open for public bidding, and only for a hundred-year control, this indicates there is no imminent danger to the Sect's existence, and it's likely there is an opportunity that doubles the profits of this hundred-year span.
