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. Register to unlock access to the new Reuters.com Access our new site and The Reuters Daily Briefing newsletter. Our free, limited time preview delivers: Unmatched global source of round-the-clock news World-class journalism and insights to make smart decisions Hand-picked insights delivered daily to your inbox New design to enable quick access to what matters most