Illegal. Illegal buying and selling of foreign exchange directly violates the normal foreign exchange management of the country. It is illegal for an actor to buy and sell foreign exchange privately without selling it to a bank in China, which will inevitably reduce the country's foreign exchange reserves, affect the country's macro-management of foreign exchange and undermine the only legal status of RMB in the domestic market. Banks and individuals shall abide by the relevant provisions of these Measures when handling personal foreign exchange business, and shall not evade quota supervision by splitting, and shall not use false commercial documents or vouchers to evade authenticity management.