<STANDARD REASON>
1) Send to too many unknown contacts
2) Send too frequent & too fast
<MAIN REASON>
1) Send message to ‘Ghost users’
(check the below 1 minute video clip to know more)
Whatsapp 户口为啥被封？你不知道的秘密！
^^ 一分钟讲解
Whatsapp Account Block?
^^Understand in 1 minute