Go to local social security. It is the same in any company. You will be covered by the social security of the city where you work. You cannot cross regions. HEYTEA is headquartered in Shenzhen. In 2012, HEYTEA originated in an alley called Jiangbianli in Jiangmen, Guangdong. It was originally named Huangcha. However, it was unable to register a trademark, so it was fully upgraded to a registered brand in 2015.