Already tried a couple of times to reset the ceiling light by
1) Delete the IOS app, and reinstall the yeelight app. Verison 220.127.116.11
2) Reset the ceiling light (on & off 5 times till the ceiling light blink)
3) Select the location to Mainland
4) Re-discover the ceiling light.
5) Manage to connect 3 lights, but all 3 lights can't update firmware to latest 1.4.8_168 (current firmware is 1.4.2_152)
The firmware update keep stuck at 30% then after that say upgrade firmware failed, so far, I have not read anybody face with such situation from the forum.
6) 2 lights are working fine without the update, but one light keep blinking. after a while, the ceiling light disconnect and unable to work on the yeelight app anymore. As I read that is due to the firmware issue.
Hence appreciate your advise to resolve this issue soonest. Thanks.