According to the website of the China Maritime Safety Administration, the Qinhuangdao Maritime Safety Administration issued a navigation warning that from 16:00 to 24:00 on April 17, part of the Bohai Sea was on a military mission and was prohibited from entering.

According to the website of the China Maritime Safety Administration, the Qinhuangdao Maritime Safety Administration issued a navigation warning that from 16:00 to 24:00 on April 17, part of the Bohai Sea was on a military mission and was prohibited from entering.