You should have a UnionPay merchant account before following this tutorial.
If you don't have a merchant account, you should apply for one from the UnionPay official website.
Contact UnionPay support directly when you meet some issues.
Help Center: Please click on Help Center to view.
You will need to prepare UnionPay MerID、Private
Follow this tutorial after you get them.
请点击 获取私钥证书PDF帮助文档 去查看，详细步骤请参见：4.4证书导出流程。
1.Please click on
UnionPay App , Enter your myshopify.com name and checked Agreed, Then click on "Add This App".
2. Install UnionPay App, Click on "Install unlisted app".
3. Approve charge.
4. Open UnionPay, Click on "UnionPay".
Input your UnionPay MerID、Certificate Password and Upload Private Certificate *.pfx、Public Certificate *.cer file
in UnionPay App.
Then visit your Shopify Store background, Input your Shopify Gateway
key and Gateway Password in Shopify Store background and
Go Through Order Proccess, At checkout step
You can check your transaction through your UnionPay App