Chinese sensible (han xin) code, Postal codes - linear, Han xin code on/off – GoDEX GS550 User Manual
Page 107: Han xin code message length, China post (hong kong 2 of 5)

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Chinese Sensible (Han Xin) Code
< Default All Han Xin Settings >
Han Xin Code On/Off
On
Han Xin Code Message Length
* Off
Scan the bar codes below to change the message length. Refer to
Message Length Description (page 6-2) for additional information. Mini-
mum and Maximum lengths = 1-7833. Minimum Default = 1, Maximum
Default = 7833.
Minimum Message Length
Postal Codes - Linear
Maximum Message Length
The following lists linear postal codes. Any combination of linear postal code
selections can be active at a time.
China Post (Hong Kong 2 of 5)