How many short messages can Fetion PC send for free a day?

In order to create a good use environment for everyone and prevent some users from sending advertisements and spam messages through Fetion service, Fetion service sets a limit on the number of messages sent by the receiver for all mobile phone short message users: 600 messages are sent at most every day and 10000 messages are sent at most every month. Please support and understand. There is no such restriction on the use of PC.