Not bad. Guangzhou Zhonggong Jewelry Testing Center official website Branch publicizes the company's reputation. Usually, the establishment of customer service system can improve the security, stability and timeliness of information and facilitate users to understand the enterprise. In this new era of internet plus, customers know that the first thing a company thinks of is the search company's official website. Guangzhou Zhonggong Jewelry Testing Center Co., Ltd. (formerly known as Guangzhou Zhonggong Jewelry Testing Co., Ltd.), established on 20 13, is located in Guangzhou, Guangdong Province, and is an enterprise mainly engaged in professional technical services.