What is the word limit for WeChat group messaging?

In WeChat, the number of words for sending messages is limited to 600 letters, namely 1200.

Rules and restrictions of mass sending information on public platforms.

1) subscription number (authenticated user, non-authenticated user), 1 message can only be sent in groups within 1 day (updated at 0: 00 every day, and the times are not accumulated).

2) Service number (authenticated user, non-authenticated user), 1 month can send 4 mass messages (according to natural month) (updated at 0: 00 at the end of each month, and the times are not accumulated).

3) The pictures and voices uploaded to the material management can be sent in groups for many times, and there is no validity period. ?

4) The upper limit of the group graphic message title is 64 bytes. ?

5) The maximum number of words for mass sending is 600 characters or 600 Chinese characters. ?

6) Voice limitation: 5M at the maximum and 60min at the maximum. Supports mp3, wma, wav and amr formats. ?

7) Video limit: 20M at most, supporting rm, rmvb, wmv, avi, mpg, mpeg and mp4 formats (after the video is uploaded, the system will automatically compress it for fans to watch on their mobile phones)?