According to the information released on Apple's official website, Chen will visit the apple store in Shanghai from 16:00 to 18:00 on December 7 (next Saturday) to hold a free course of "music lab". Participants will use the iPad's Library band app to "recreate" Chen's songs, such as adding new instruments and other functions, to create their own versions.
Unfortunately, at present, the number of applicants for this activity is full. However, it does not rule out that there will be cancellations by pre registered people. If you are interested, you can always pay attention to the appointment page.