What short message platforms do you have in Beijing?

There are many mass messaging platforms in Beijing. Ali is bigger than Babu, which means instant messaging. The former is a big brand with strict requirements and more restrictions, and there is no manual customer service. The latter is correspondingly flexible, and manual customer service is easier to handle. The key is to do a good job of after-sales service and solve the difficult problems encountered by customers at the first time. Highly recommended!