You already said China so I guess I'll go Hong Kong.
Hong Kong (香港) means fragrant harbour. The origin of this name is unknown, but there are theories of it coming from a type of wood we produced, a nice river, the wife of a pirate, or some residents just pronounced it with an accent to the British soldiers.
In mainland, people would sometimes just type the initials of the pronunciation of the character. For example, hhhhh (哈哈哈哈哈, hahahahaha), sb (傻逼 sha bi, dumbass). It can get out of hand for people who are not super familiar with their vocabularies (like me, a Hong Kong Cantonese speaker)
Alternatively, one can just use a different dialect/version of Chinese. In Hong Kong, we can have both written Chinese and spoken Cantonese mixed in the same message. We simply pick which one of them gives a shorter version of the word. For example, 回家看看有無撞其餘活動 ([Written] Go home and see [Spoken] if it conflicts with other events). Sometimes we even mix in ancient Chinese.
Doesn't work. I live in Hong Kong, which has some of the world's most efficient public transport systems. People don't actually talk. They just look at their phones. A train cart can be full of people but no conversation.
Hi, I am the emperor of the Qin dynasty (207 BC). I am not actually dead because I found the medicine of immortality. I want to rebuild my empire but I currently don't have any money. Can you send me a few liang (兩, Chinese mass unit) of gold to get started? I must heavily reward you when my empire thrives again.
Edit: I typed this from memory. Apparently this is a reply to another ridiculous scam message of someone pretending to be the son of 蔣介石 (leader of Republic of China in 1928-1975).
Same would happen with the Switch 1 if you play pirated games through sigpatch though