They are using rules to add multiple ADUs.Here is a list of why adding a single ADU in dingle family  zoned areas in my CA market is typically a poor RE investment:1) The value added by the ADU addition is often significantly less than the cost of adding the ADU.

I thought I was buying at top of the market in 2020...and 2022...but prices continue to remain high. 

Yes, I realize it was the first time, that is why I would cover the cost in an effort to be a good landlord and not discourage my tenants from reporting future issues.

Study the market.

Sit back and wait for the market conditions to flip to where those strategies would work for me, or adapt to the current market.  

Additionally, their marketing was very compelling.

This is not an eviction.Please make arrangements and good luck in all your efforts.

If willing to invest more effort for higher ROI, consider Option 3 (building your own team), though it requires time to establish reliable management.

It's a good time to review markets, but living in China there are a lot of other closer, international markets that could be options as well.

If it's substantial enough, they may actually put effort into the search.