how to take bus from HK causeway bay to zhuhai chimelong ocean kingdom? how long is the journey?

You are suggested to walk to Cannon Street, Gloucester Rd first, and then take Bus 2 to Central, HK-Macau Ferry Terminal.
Then you can take a ferry to Jiuzhou Port, which takes about 70 minutes and 240HKD.
After arrival, you can take Bus 4 and transfer to Bus K10 at Shuiwantou, and then get off at Hengqin Bay Hotel. Walk west for about 10 minutes, you will get to your destination. It takes about 1h20 minutes and CNY5.