Ummm...Hong Xing,
Since when do the characters 8-1 appear on any of the HK or the official PRC flagd and emblem!? It only appears on the PLA flag and emblem!!! And unfortunately (for you...) the PLA flag does not belong to any official emblem or flag in HK althought the PLA do indeed have a garrison stationed in Hong Kong!
Please refer to the HKSAR Protocol Unit's website for more info...thanks!
http://www.info.gov.hk/protocol/eng/index.htm