China has a specific pre-registration process, that needs to be done prior to being able to execute messages towards their end customers.

Pricing and plans can be discussed with your account managers prior to initiating the registration process

Country

Hong Kong

Pre Registration

No

Registration Type

-

Charges

No charges

ETA (Working Days)

-

Alphabetic Sender ID

Yes

Numeric Sender ID

-

Long Code Support

Yes

Short Code Support

No

Unicode SMS Support

-

Character Set

-

2 Way SMS Support

Yes

Number Portability

Yes

Noc Format

-

DLR Format

-

Sender ID Type

Dynamic Sender ID

Doc required for registration

-

Comments

For ChinaUnicomHK (45407) and ChinaMobileHK (45412):
All senders will be replaced by local Hong Kong numbers to ensure delivery, as alpha sender IDs are often problematic for 1 sim-2 numbers subscribers.
For CSL (45400) , Hutchison (45404) , SmarTone (45406) and PCCW (45416):
Dynamic alpha senders within 3-11 characters length are supported,
 Non-alpha senders are replaced by local Hong Kong numbers or “SMS” as an alpha sender-ID to deliver.

Message restrictions

-