Chengxi District, Xining City. According to the official website of the Qinghai Provincial Bureau of Justice, the Qinghai Provincial Notary Office is located at No. 119, Xincheng Avenue, Chengxi District, Xining City. The Notary Office is an institution that provides notarization services to citizens, legal persons or other organizations in Chengxi District. Therefore, the notary practice area in Qinghai Province is divided into Chengxi District of Xining City.