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.
The features and restrictions for sending SMS to China are as follows:
All forms of Sender ID will be replaced by a 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 content are most likely to 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, Red Timber, Alcohol, Politics, Fraud
- Transactional content:
No restriction applies to notification or OTP (one-time password) traffic. Message content may be modified with signatures ( e.g 【Signature】) appended at the front or end of the message to ensure delivery.
- Promotional/marketing content
Promotional/marketing related messages are also under heavy screening by local operators. 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 firstname.lastname@example.org for assistance.
Concatenated messages are supported for all networks.
Unicode is supported for all networks.
Handset delivery receipts are supported for 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