Celebrity Millennium cruise 3/25/17 from Shanghai to Hong Kong

A group of 17 travelers will be traveling to Shanghai from the US leaving on 3/22/17 arriving 3/23. We are staying in Shanghai with tour provided by Chinatour. The cruise will begin on 3/25 at the Shanghai port. Then to Beijing for three days, 2 nights in Beijin with Chinatour. Then to Seoul and Jeju Island Korea, Nagasaki Japan, Taiwan and then ending in Hong Kong. We stay on the ship overnight on 4/7 and disembark 4/8 and will stay in Hong Kong and leave Hong Kong for the US on 4/10.

Please advise Visa requirements. Thank you very much.