My sister will be arriving on an international flight to HK airport at 6:30 pm. First, does she have to pass through HK Immigration/Customs to get to the ferry counter/terminal. Second, if yes, will she have time to catch the last ferry to Zhongshan. Third, I was planning to take the ferry from Zhongshan to HK airport to meet her upon arrival and return with her to Zhongshan. Is this possible, can I meet her at the HK airport ferry terminal/counter and return to Zhongshan with her or will I have to take the ferry from Tsim Sha Tsui terminal to return to Zhongshan?