On social media platform Xiaohongshu, Chinese tourists arriving in Japan for the first time since the pandemic have recently been marveling at the dozens of digital wallets and mobile payment services available in a country where cash, until recently, was king.  Now Chinese fintech giant Ant Group is making a renewed effort to unite the fragmented market by integrating these different digital wallets, and others across the region, onto one platform — Alipay+, which it first launched in