If You Know What I Mean
it's most likely because a gas spill would make contact with hot engine which is very close to gas tank. you know how easily it is to spill from overflowed gas tank or excess gas spilling out from a hose.IMHO it's pretty dangerous suppose prankster flicked lighted match to person filling up the tank with pot, Foomp!!
I understand that it's Chinese law and I would have to fill it with pot. Perhap bring repair putty to fix leaky pot so me and rest of the Chinese population can use it without worrying about leaks
I think they made a law because large population of Chinese people smokes so probably why pot was a reason for safety. Supposed if someone had an urge to light a cigarette while having pot next to them away from gas pump, (light cig and kboomm!!!) so Gas pump would not be needed to put out fire,