Changzhou (549) is a Type 054A frigate of the People's Liberation Army Navy.

The autonomous Type 730 provides improved reaction time against close-in threats.

During the 2019 novel coronavirus epidemic, on February 17, 2020, the Liberation Army Daily disclosed that a number of officers and soldiers in the eastern theater of the People's Liberation Army are being quarantined for observation, including Yu Songqiu, captain of Changzhou.

According to reports, the theater is adopting measures such as strict management, temperature measurement and disinfection, and returning to the team to isolate, and will adjust the plan to try to ensure that the annual training mission is not affected.

[3] The report quoted Yu Songqiu as saying that he himself was under observation in the guest house of a certain detachment, and some officers and soldiers of various units were also under quarantine observation, but the work was smooth and orderly, and the enthusiasm for training and preparation was unabated.