Why are general state speeches limited to 140 words?

The limit of 140 character is to imitate Twitter, which is limited by short message characters. It is said that Friedhelm Hillebrand, the father of short messages, typed some sentences at home at first, and then counted them and found that these sentences basically did not exceed 160 characters. Later, with this as the goal, he promoted the research and standard formulation in the technical standard formulation of Deutsche Telekom and GMS, and finally determined the technical limit of short message length 160 characters. Twitter has been following this standard since it was designed to support SMS tweets, but Twitter has reserved 20 characters to display the user ID, so it is 140 characters. In addition, the 140 character limit of Sina Weibo or other Chinese services is not the above-mentioned 140 character, because the 160 character standard uses a 7-bit binary character code, that is, ASCII code, which only contains numbers, English letters and some common symbols. The 16-bit character code like Chinese characters can only send 70 characters, which is also the basis of the current length limit for sending Chinese short messages on 2G networks. A service like Sina Weibo needs to send at least two short messages if it wants to send Weibo with the Chinese character 140 by SMS. So it's just imitating the word limit, and there may not be much practical consideration.

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