Hello! 1, HK$/USD against RMB Mainland: Only domestic people holding mainland ID cards and foreigners holding passports, Hong Kong and Macao passes and visiting relatives can exchange HK$ and USD into their RMB account of one-card in the Mainland for free through online banking. The foreign exchange settlement limit per person per year is 50,000 dollars.

2. Hong Kong dollars and US dollars: The starting point is 50 Hong Kong dollars or 7 US dollars, and there is no exchange ceiling at present.