https://www.reuters.com/article/us-cenbanks-digital-china-analysis/analysis-china-digital-currency-trials-show-threat-to-alipay-wechat-duopoly-idUSKBN2CD03V >Shanghai - In China's commercial hub Shanghai, six big state banks are quietly promoting digital yuan ahead of a May 5 shopping festival, carrying out a political mandate to provide consumers with a payment alternative to Alipay and WeChat Pay.