China: SMS Features & Restrictions


China is one of the largest and fastest growing mobile markets in the world, but, it is also one of the most difficult countries to reach as many filters are in place to block messages in and out of the country. Cheap links into China will simply not work and majority of the messages will be rejected or blocked. Thanks to Nexmo’s local carrier links, you can now deliver messages to all Chinese networks with very high delivery-ratio.


The features and restrictions for sending SMS to China are as follows: 

Sender ID:

All forms of Sender ID will be replaced by a random numeric number for all networks. 


Content at risk of being blocked/filtered:

Mobile operators in China are actively blocking and filtering numerous keywords.

Adult, religious and especially political contents are strictly prohibited and will be blocked. Here are some known filtered keywords/categories:

  • Keywords:  Falung Gong, SB, Tienanmen Square
  • Categories of: Gambling, Adult content, Property, Education, Immigration, Financing, Loans, Beauty care, Cosmetic surgery, Healthcare, Alcohol, Politics, Fraud

Transactional traffic:

Messages must have signature included at the front of the message body. Signatures have to be in following format:

1)  [Signature] for contents in GSM7 characters ( e.g [Vonage] Your verification code is 1234 )

2) 【Signature】for contents in Unicode characters (e.g 【Vonage】你的验证码是1234 )

Messages contents without any signatures included or not registered will be subject to filtering by the operators, which will result in delivery failures

Nexmo also has very high quality routes for transactional content, which requires pre-registration and is reserved for customers sending more than 100K messages per month. With our high quality routes, customer can register with their own signatures.

*Important note: Due to change of policy at operator sides, we will no longer accept registration of OTP and Notification messages which include a URL link. Registration of messages related to games, gambling, finance, loan, virtual currencies and stock trading business are not accepted as well even it is OTP and Notification messages.

 Promotional/marketing traffic:

Any promotional/marketing related messages towards China will have to go through the pre-registration procedures and is subjected to approval.


If you need high quality connection for your transactional traffic or you plan to send promotional/ marketing traffic, please contact your Account Manager or for assistance. 

Concatenated messages:

Concatenated messages are supported for all networks. 


Unicode is supported for all networks. 

Delivery Receipts:

Network level delivery receipts are supported to all networks,

meanwhile, handset delivery receipts are supported for registered campaigns to all networks. 

Other features/restrictions of note: 

  • Maximum number of messages allowed to destination number:

To avoid spamming the end users, maximum of roughly 3 messages with the same content or 15 messages with different contents can be sent to one single number within 24 hours. Messages exceeding this limit may be blocked by local mobile operators





  • 发送方号码将会改成随机的数字号码发出 




 - 关键字:法轮功,SB,天安门广场;
 - 相关类别内容:赌博,成人,房产,教育,移民,金融服务,贷款,美容护理,整容手术,医疗保健,酒精. 



- 为保证传送质量,短信内容开头请添加自定义的签名,签名格式如下:

  • 如内容为英文等GSM7 字符,添加 [Signature] (模板:[Vonage] Your verification code is 1234 )
  • 如内容为中文等Unicode 字符,添加 【Signature】(模板:【Vonage】你的验证码是1234 )


- 如您发送的是验证或通知类型的短信,可以考虑注册使用我们高质量的短信通道,使用注册通道的客户可以选择注册自己的签名。请注意这类通道只开放给每月发送超过10万条短信的客户。




- 中国网络运营商对营销/市场推广相关短信也有高度筛查机制,任何营销/市场推广相关内容都必须经过预先备案并获得批准。










  • 短信条数限制:




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