Reliable. Shenzhen Zhongjiang Jinyi Jewelry Training is a professional jewelry appraisal company. Founded on 20 12, the company is a formal company protected by official website certification law, so it is very reliable. The quality and effect of the company's lectures are very good and are deeply loved by the masses. Shenzhen is a prefecture-level city under the jurisdiction of Guangdong Province, a sub-provincial city in Guangdong Province, a city with separate plans, a megacity, a China Special Economic Zone approved by the State Council, a national economic center city, an international city, a scientific and technological innovation center, a regional financial center and a trade and logistics center.