Guangzhou Baiyun District has introduced cheaper hotels or guesthouses with bathtubs.

I lived in a cold pavilion for 7 days without a bathtub.

Moreover, there are few or no 7-day Hanting suites in China, let alone bathtubs.

Only Jumeirah apartment in Zhujiang New Town has a bathtub, which is close to 400 a night.

You can make a reference. Baiyun district doesn't know for the time being. More than four stars should be enough.