Shanghai Mobile sends hundreds of text messages every month. Which package is best?

I also like to send text messages, but I can’t afford the cost. . . Later, I switched to Qiankou because the traffic was cheaper. And now Shanghai Mobile does not have a separate SMS package that can be ordered, only the new version of the M-Zone online chat package (160 text messages) and the Internet package 18/28/38 packages (text messages are 100/150/200 respectively). If you use data to send text messages, you can use Fetion (if you have a mobile number) or you can download the Youni software, which is similar to Fetion, or simply use Qiankou or WeChat to chat