The IMB recently published an article about Chinese Muslims called, The Growing Influence of Islam in China. I encourage you to check it out and view the photo gallery showing the distinct mosques across China and styles of dress.
The reality is that the influence of Islam is not growing in China now to the degree that it was. You often hear of stories of how it is difficult to follow Jesus in China. The truth is those same difficulties are beginning to exist for Muslims as well. It is easy to call yourself a Muslim, but it is becoming harder and harder to truly follow Islam without consequences especially if you work in the big cities and have a good job.