I have done 3 overseas transfers from sg Maribank to Wechat wallet, the highest rate is 5.23 follow by 5.20. And I also tried one transfer from POSB saving account to Wechat wallet which only gave 5.19. Topping up the wechat wallet will give me ease of mind for my coming trip to Hubei next week. Besides, linking my Maribank and Youtrip card to Wechat and Alipay and I also found out OCBC app allows me to scan the China QR code for any transaction. If you have an OCBC saving account and OCBC app, just scan the China QR code for any purchases, it's kinda backup when both wechat and alipay are not working.