1. Settlement of foreign exchange: Simply put, it is to change foreign currency into RMB. It is stipulated that each person can exchange up to US$ 6,543,800+or equivalent foreign currency every day, and the accumulated amount should not exceed RMB 50,000 per month, otherwise it needs to be examined and approved by SAFE. However, the purchase of foreign exchange can be exempted from this restriction. 2. Selling foreign exchange: buying foreign currency with RMB. Residents who adopt different management measures for mainland residents and non-residents: they can buy the equivalent of $20,000 per year with their ID cards. If it is not enough, they can continue to purchase foreign exchange through studying abroad or traveling. Non-residents: including compatriots from Hong Kong, Macao and Taiwan and overseas Chinese, the most common way is to buy foreign exchange with wages, but it must be remitted. You can also use the settlement certificate within half a year to return foreign exchange without remittance.