drone fly  only 600m in city，so i must advice the producter label the distance in city ,not only label 7 km!!!

https://www.skypixel.com/videos/dji-79d8552e-ef1b-403e-b3c1-d93bb283dd8c?utm_source=url&utm_medium=copied&utm_campaign=share

https://www.skypixel.com/videos/ ... ;utm_campaign=share

I agree!  Looks like you live close enough to the owner to complain personally.

in the video，my drone almost crash building after lost signal

Poor range due to the heavy interference in city environments is quite normal.

DJI specify the max range without interference.
Max Transmission Distance2.400 - 2.483 GHz (Unobstructed, free of interference) FCC: 4.3 mi (7 km)
DJI don't know how much or how little interference in your area so they can't tell you what range you might get where you fly.

Wireless hot spots in the city are inevitable，so we must lable the range

Hey there, just as Labroides mentioned, the range can not be ensured when there are heavy interference. I would suggest change to another open location without interference to ensure the flight safety. Thanks!