What is the earliest city in China where Jews settled?

As early as the Han Dynasty, some Jews immigrated to China. At that time, due to long-term persecution, they were nervous and closed, so after obtaining the permission of the court, most of them moved to Kaifeng, Henan Province. Therefore, Kaifeng is the earliest Jewish settlement in China. Later, due to the formation of semi-colonial and semi-feudal society in the late Qing Dynasty, they began to migrate to metropolises such as Beijing, Tianjin, Shanghai and Hong Kong, and later a large number of German and Russian Jews moved to Harbin, Tianjin and Hong Kong.