In Chinese, large numbers are counted in ten thousands (10,000 = 万 wàn, 100,000,000 = 亿 yì) instead of thousands (1,000 = thousand, 1,000,000 = million, 1,000,000,000 = billion). This means that converting numbers is an exercise in counting zeros, and if you’re not careful, you may be off by a couple of orders of magnitude!
There’s a classic story about the word 万: Back in ancient China, there was once a pauper who struck it big and became wealthy. He himself could not read, but he wanted his son to be literate, so he hired a teacher for him. The teacher started with numbers:
Three strokes is three: 三
‘This is easy,’ thought the son, so he told his father that he had learned how to write, and the teacher was not invited back again.
Some time later, a friend of the father’s, whose surname was 万, came to town to visit. The father thought it would be an excellent opportunity for his son to show off his writing with a welcoming poster for his friend, so he asked his son to make a poster with the word 万.
The son sat down to write, and was still hard at work a few hours later. Curious as to how a single word could take so long, the father went to check on his son.
To the father’s surprise, the son had filled up multiple sheets of paper with single strokes. The son turned and wailed to his father, “I’ve only managed to write 300 strokes! Why does your friend have to have the surname 万??”
Fun(ish?) fact: I timed myself to see how many strokes I could write in 1 minute, and ended up with 141. At that constant speed, it would only take 1 hour and 11 minutes to write a full 万 of strokes. So even though the son was completely wrong, it still would have been a doable task (and he was rather slow at it, really).