The authority of Zhongjing Aoyu Jewelry Testing Center. Beijing Zhongjing Aoyu Jewelry Testing Center was established on October 23rd, 2005, with its registered address at Room C 1602, No.2 Xizhimen South Street, Xicheng District, Beijing, and its legal representative is Dong Zhenxin. The business scope includes licensed projects and inspection and testing services. Therefore, it is authoritative to take the middle school exam.