How to go to disneyland from kowloon (cityview hotel)?

Since your hotel is close to Yau Ma Tei MTR Station, so you can walk to reach that station to take the Tsuen Wan Line to reach Lai King where you can change to Tung Chung Line to reach Sunny Bay Station. At this station, you can find Disneyland Resort Line to take you to reach Disneyland directly.

Thanks very much for the info

Can you tell me the best way to go to Shenzhen from HK?

East Rail line is most suggested. At Hung Hom, HK, you can take East Rail line to Lo Wu, HK. Cross the immigration border nearby to Luo Hu, Shenzhen. Then you can take the local public transportation to your destination.

Thanks very much