What does the sentence "I can't leave Henan again" mean?

Allusions come from Fangcheng and Sheqi counties in Nanyang, Henan Province: drivers can't run out of Fangcheng; No matter how complete the procedures are, you can't cross the social flag. This sentence was summed up by long-distance truck drivers in two counties in their daily work in the early years, and it has been tried and tested time and again. Because it is catchy, it is widely circulated by truck drivers.