Log into the online service platform of the Shanghai Municipal Tax Service, click on [I Want to Query] - [Export Tax Refund Information Query], and find the [Export Tax Refund Rate Query] module. This module allows you to query the export tax refund rates for goods and taxable services. You can click on "Filter" and enter conditions such as "commodity code", "commodity name", "tax type", and more to search for relevant export tax refund rates based on your needs.

Website of the online service platform: https://etax.shanghai.chinatax.gov.cn/

Source: WeChat account of Foreign Affairs Office of Shanghai Municipal People's Government