Hello,Mj
From Hong Kong Intl Airport to Royal Plaza Hotel, you have options:
1) Airport coach service at HK$150 per person.
2) Airport Express to Kowloon Station first at HK$90 per adult and then free shuttle bus to the hotel.
3) Airport Express to Tsing Yi station first at HK$60 per adult and then from Tsing Yi station to Mong Kok Station at HK$7.5 per adult using single journey ticket.
From the hotel to Macau, first get to China Ferry Terminal at TST and then use ferry service from China Ferry Terminal to Macau.
From Hong Kong to mainland China, you can take MTR to Lo Wu or Lok Ma Chau station to get to Shenzhen or take cross-boundary buses to Pearl River Delta cities or take through train to Beijing and Shanghai.