Yeelight Apps not conneting to Wifi

Dear Sir, I have a Mi Home Account using China server and it is connected with Yeelights Account using Singapore Server.
I tried to add new device Arwen 450S.
It can detect the new Arwen 450S after the Bulb reset… but when it comes to the Wifi selection, it does not see any wifi in the home.
When I try to click on the wifi name, it goes into the Yeeling Setting on the Iphone Setting page.
What should I do?