Thank you all for answers
I guess based on what lightse003 this means if the child is born on any land considered part of "China" whether its within the Mainland, in Macau, or even Taiwan. He or she should be able to gain right of abode by descent of parent(s) who already hold right of abode in HK as a Chinese citizen even if the parent also gained it by descent. Interesting the ordinance is ambiguous on this. Therefore one would be confused to whether there is a limit to generations of Chinese given right of abode in HK while born in Mainland, Macau, or Taiwan of "HK" parent(s). Though its nice to learn the parent would not need to travel to Hong Kong to give birth in the case I mentioned for the child to secure right of abode. Of course things would be different and interesting if the parent happens to be in a foreign country. Chinese Nationality law article 5 makes it confusing whether the child would gain Chinese nationality in different case. I.e the child will have Chinese nationality under Jus sanagus with the big exception if both Chinese National parents "settled" abroad and the child receives foreign nationality at birth. Though things do get interesting if parents where "settled" in the different foreign country than where the child is born. I.e if the parent(s) with Chinese Nationality have Australian citizenship but gave birth to the child on a long term temporary assignment in Japan, in which case the child does not receive Japanese Nationality under Japan's Jus Sanagus nationality system but he or she may receive Australian citizenship at birth by descent. I guess China would still consider the child a Australian under article 5, which means some hoops for the parents to go though should they bring the child back to Hong Kong or other part of China, though its interesting how they will find out.