According to Wu Shuo, Wanxiang revealed that Ethereum co-founder Vitalik Buterin will appear at the second venue of the Hong Kong Web3 Carnival at 10:15 am on April 9 to deliver a keynote speech titled "Reaching the Limits of Protocol Design". At 13:45 pm that day, he will also give a keynote speech titled "Building on Ethereum in the 2020s" at the main venue. This speech seems to be a temporary decision and was not included in the earlier promotional posters.