Appraisal by National Vocational Training Center. Shanghai sommelier qualification certificate national vocational training center appraisal examination. Shanghai, referred to as "Shanghai" or "Shen" for short, is a provincial-level administrative region, municipality directly under the Central Government, national central city, megacity and core city of People's Republic of China (PRC)-Shanghai metropolitan area, an international economic, financial, trade, shipping and scientific and technological innovation center of China approved by the State Council, and a national historical and cultural city. As of 202 1, the city has 16 districts with a total area of 6340.5 square kilometers. At the end of 20021,the permanent population of the city was 24,894,300.