Is it necessary to isolate from Shanghai to Gangu?

No need. Shanghai, referred to as "Shanghai" or "Shen" for short, is a provincial administrative region, municipality directly under the Central Government and national central city of People's Republic of China (PRC). Gangu County belongs to Tianshui City, Gansu Province, and is located in the southeast of Gansu Province. According to the data of epidemic prevention and control in Shanghai and Gangu County, the two places have achieved the feat of eliminating the number of COVID-19 cases, which are low-risk areas and do not need isolation. Anyone can go to Wangmang Ridge tourist area, as long as they carry the health code.