Is Saudi and Xinjiang the same?

It's different. According to Netease News Network.

1, Uyghur and Arabic are not only different languages, but also completely different in language family affiliation. However, these two completely different languages are sometimes easily confused internationally.

2. This is mainly because Uyghur borrowed a lot of Arabic letters in the process of forming its own written language. The ethnic origin of Uighurs can be traced back to Dingling, a place where nomadic people lived in the south of Lake Baikal in the north and northwest of China in the 3rd century BC, between the Irtysh River and Lake Balkhash. Some history books also write it as Dingling and Dingling. Dingling people were once ruled by Xiongnu, Xianbei, Rouran and other tribes rising on Mongolian grassland.