Network problems. Jiangsu Zhongzhi Jewelry and Jade Testing Co., Ltd., established on 20 15, is located in Lianyungang City, Jiangsu Province, and is an enterprise mainly engaged in wholesale industry. There is a network problem with the mobile phone, which will lead to no query results in official website. The solution is to replace the high-quality network. Mobile phone, also called mobile phone or wireless phone, is a communication tool and a portable telephone terminal that can be widely used.