Joke Collection Website - Public benefit messages - Why are some mobile phones limited to 70 Chinese characters at a time and some mobile phones limited to 200 Chinese characters at a time? Why?

Why are some mobile phones limited to 70 Chinese characters at a time and some mobile phones limited to 200 Chinese characters at a time? Why?

70 Chinese characters are charged according to the money of a short message. If you send 200 Chinese characters at a time, it is 70+70+60= the money for three short messages. Sending 200 Chinese characters at a time is not a principle. Send more text messages if you want.