UK citizen with +6 months on ARC. Can I get the ferry into China from Incheon?

I think the embassy accepts the ferry ticket towards China, but the ferry ticket or flight ticket leaving China to the next destination is also required. You need a hotel reservation for the whole stay in China, however, I know that it is hard for many applicants who come to visit China individually to provide it, they organize the tour freely and can't make the hotel reservation in avance, you can provide the hotel reservation for just upon arrival to have a try.