Are there any good cruise lines from Beijing to Japan and South Korea?

If you are in Beijing, it is more convenient to get on the boat at the pier in Tianjin. Zhongxin Tourism Caribbean Voyager Japan and South Korea 6-day tour only costs 3,000 yuan, and Ocean Myth 8-day tour only costs 4,000 yuan. Because it is operated in chartered flight, it is very cheap, and these routes have been in operation for many years, which is quite trustworthy.