Can I light a gun after Shanghai Mahjong is suspended?

The subject wants to ask, "Can Shanghai Mahjong be popular after listening to the cards?" ? You can't. There is no such thing as cannon in the rules of mahjong in Shanghai, but in traditional mahjong, cannons are not allowed after listening to cards. Shanghai, referred to as "Shanghai" or "Shen" for short, is the largest economic center and an important international financial center city in China.