Well-known Chinese news site Sina recently reported that the Chinese Navy’s second carrier barracks ship is very close to completion and will serve the Navy soon. A carrier barracks ship is generally to support an aircraft carrier as part of the fleet. This type of vessel is an invention of the Chinese Navy. It is typically used to support the long testing phase of a new aircraft carrier, or to transport a large number of citizens home from aboard in an emergency such as a rescue mission. China currently has one barracks ship that accompanies the only aircraft carrier in service. The delivery of this second ship signals the near-completion stage of the second aircraft carrier which is fully made in China. The Chinese barracks ships are designed based on civilian cruise ships. A barracks ship travels with an aircraft carrier that is typically in the testing phase. It provides more comfortable accommodations for non-military staff and offers room for special equipment as well as helicopters.
Source: Sina, January 2, 2018