That's all regarding rules & guidelines particularly for App sub-forum. You can learn more about MIUI English Forum and also App sub-forum by referring to the threads below.
Mi Community App Sub-Forum FAQs
In order to fulfill the basic functions of our service, the user hereby agrees to allow Xiaomi to collect, process and use personal information which shall include but not be limited to written threads, pictures, comments, replies in the Mi Community, and relevant data types listed in Xiaomi's Private Policy. By selecting "Agree", you agree to Xiaomi's Private Policy and Content Policy .