The price of RMB including tax is converted into Hong Kong dollars. For trading companies, VAT is calculated according to the price excluding tax. So the tax refund rate should be multiplied by the amount shown on the VAT invoice (pre-tax amount).

Simple formula: the purchase price includes tax ÷ 1. 17X tax rebate rate.

That is, if the VAT rate is 17% and the tax refund rate is 13%, the tax-included price of the purchased goods is1000/1.17x13% = 65438.

Today, the exchange rate of RMB against Hong Kong dollar is 0.8225. That is, if it is CNY 1000 yuan, it is equivalent to 1000*0.8225=822.5 Hong Kong dollars.