Children learn flag language at the pier 3 in Qingdao Port of Qingdao, east China's Shandong Province, April 21, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding.

From April 20 to 24, the public in Qingdao will be able to tour the missile destroyers Guiyang, Shijiazhuang and Kaifeng, missile frigate Handan, supply ship Kekexilihu, and submarine rescue vessel Hongzehu at the pier 3 and the Qingdao International Sailing Center pier.

Most of the vessels have been involved in major missions such as escort mission in the Gulf of Aden, overseas port visits and joint exercises.

In addition to Qingdao, the navy said it would organize simultaneous open day activities at its barracks in other cities, including Dalian, Yantai, Ningbo, Wuhan, Xiamen, Guangzhou, Haikou and Sanya. (Xinhua/Li Ziheng)

People pose for photos with a navel soldier on the missile destroyer Guiyang at the pier 3 in Qingdao Port of Qingdao, east China's Shandong Province, April 21, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding.(Photo by Ma Jiewen/Xinhua)

People visit submarine rescue vessel Hongzehu at the pier 3 in Qingdao Port of Qingdao, east China's Shandong Province, April 21, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding.(Photo by Ma Jiewen/Xinhua)

Visitors try on fireproof suits at the pier 3 in Qingdao Port of Qingdao, east China's Shandong Province, April 21, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding. (Photo by Ma Jiewen/Xinhua)

A visitor learns to tie knot at the Qingdao International Sailing Center pier in Qingdao, east China's Shandong Province, April 22, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding.(Photo by Ma Jiewen/Xinhua)

This aerial drone photo shows people visiting a navy vessel at the Qingdao International Sailing Center pier in Qingdao, east China's Shandong Province, April 22, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding.(Photo by Ma Jiewen/Xinhua)

Visitors try on fireproof suits at the Qingdao International Sailing Center pier in Qingdao, east China's Shandong Province, April 22, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding. (Photo by Ma Jiewen/Xinhua)

This aerial drone photo shows people visiting navy vessels at the pier 3 in Qingdao Port of Qingdao, east China's Shandong Province, April 21, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding.(Photo by Ma Jiewen/Xinhua)

This aerial drone photo shows people visiting navy vessels at the Qingdao International Sailing Center pier in Qingdao, east China's Shandong Province, April 22, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding.(Photo by Ma Jiewen/Xinhua)

This aerial drone photo shows people visiting supply ship Kekexilihu (front) at the pier 3 in Qingdao Port of Qingdao, east China's Shandong Province, April 21, 2024. The Chinese People's Liberation Army Navy holds open day events in multiple coastal cities including Qingdao around April 23 to mark the 75th anniversary of its founding. (Photo by Ma Jiewen/Xinhua)