If you want to exchange Hong Kong dollars, you need to go to a bank with foreign exchange business. Wechat payment can be used in Hong Kong. Wechat payment has covered major shopping malls and chain brands in Hong Kong, such as Dienis Paradise and Hong Kong Metro.
However, the popularity of WeChat in Hongkong is not as good as that in Chinese mainland. Some small shops still can't pay by WeChat, so it's better to take some Hong Kong dollars when traveling in Hong Kong in case of emergency.
Save the unused Hong Kong dollars and go to Hong Kong next time, or exchange them at a convertible bank outlet. Before the exchange, ask the bank outlets if there is any exchange service for Hong Kong dollars, and then follow the instructions of the staff to exchange them into RMB. The vast majority of Hong Kong dollar banknotes are issued by HSBC, Standard Chartered Bank and Bank of China.
skill
All major banks in Chinese mainland can handle the cash exchange business of Hong Kong dollars, which is the most cost-effective exchange rate insurance option. But don't forget to make an appointment in advance. I suggest asking about the minimum and maximum exchange amount. You need to bring your ID card when you exchange it.
Under normal circumstances, the exchange rate between China Bank and China Merchants Bank for Hong Kong dollars is more cost-effective. When Hong Kong dollars are exchanged for RMB, ICBC's exchange rate is more favorable. However, the exchange rates of major banks fluctuate slightly every day, so we should choose according to the actual situation.