Salam brother Ayman,
Nice videos,Ya masyaallah!
I think its from Yunan's (XI AN) ethnics,Theyre very religious chinese muslims.Islam in China dates back to the days of the Caliphate of Uthman ibn Affan (radiAllahu anhu), the third Caliph of Islam.
After triumphing over the Byzantine, Romans and the Persians, the Caliph sent a deputation to China in 29 AH (650 CE, eighteen years after the death of the Prophet Muhammad (salAllahu alayhi wasalam).
The Ancient Record of the Tang Dynasty describes a landmark visit to China by Saad ibn Abi Waqqas (radiAllahu anhu), one of the companions and maternal uncle of the Prophet Muhammad (salAllahu alayhi wasalam) in 650 C.E.
Saad Ibn Waaqas (radiAllahu anhu) invited the Chinese Emperor Yung-Wei to embrace Islam.