curl --location --request GET 'https://sandbox-gateway.pingpongx.com/v2/fx/trade/market/price?buy_currency=CNH&sell_currency=USD&value_date=2023-05-16' \ --header 'access_token;'
{ "code": 0, "data": { "base_currency": "USD", "base_currency2": "CNH", "buy_currency": "CNH", "sell_currency": "USD", "ref_price2": 0.139046, "ref_price": 7.19185 }, "message": "ok" }