Why is the length of SMS limited to 70 in Chinese and 0/60 in English?

Because English uses ASCII encoding, and an ASCII encoding has only 7 digits, Chinese characters are stored in UTF-2, and a Chinese character consists of 2 characters. So this is 7 * 160/8= 140 (this is the number of characters that can be stored after being converted into UTF-2 encoding), and then divide by 2 on the basis of this formula, which is 70. This is why Chinese has 70 characters and English has 160 characters. As for why a short message can only be sent in 70 Chinese, 160 English. According to Baidu, people who design short messages think that 160 is an incredible number, so they set it like this. (fabrication)