Its a sign telling you to learn mandarin.
Maybe you can try holding airflow up/down buttons at the same time. Or pressing down and left buttons.
I will not learn mandarin ah ah.... the unit also refused to turn on the voice command mode. I tried to activate them but I only got an error message in mandarin, which translated meant function not available.
Tomorrow it will go back to china...
Soo a secret combo key to change language? Can't be true...
I asked now the official quick store on AE:
https://www.aliexpress.us/item/3256806525802714.htmlif I get a unit in English language and not in chinese...
I keep you posted....
First impressions
pros:
1) build quality is excellent
2) the user interface is very sexy
3) seems powerful and silent but did not play with it too much...
cons (apart for the language cluster fuuu):
1) the nozzle cable length is about 10-8mm SHORTER than my 861DW. WTF.
2) if you press the wrong arrow button, the unit jumps immediately in an unwanted function... and I went to panic mode to turn it off...
Sooo some learning curve is necessary to ride such a horse.
PS: I am the only one who would like a 10cm/20cm longer nozzle cable length?