A Chinese aircraft carrier sailed past Taiwan over the weekend in a show of strength as the U.S. Navy struggles with coronavirus.

Japan’s ministry of defense said Monday that the aircraft carrier Liaoning and its strike group, including five warships, passed through the 155-mile wide Miyako Strait between the Japanese islands of Okinawa and Miyako on Saturday, before turning south and passing east of Taiwan on Sunday. The strait is an international waterway.

Taiwan’s navy also sent ships to monitor the strike group as it passed on Sunday, according to Taiwan’s ministry of defense, per the South China Morning Post.