A welcome ceremony is held as China's 37th naval escort fleet returns to a port in Zhanjiang, south China's Guangdong Province, June 29, 2021. A Chinese naval fleet returned to a military port in Zhanjiang on June 29, after concluding escort missions in the Gulf of Aden and the waters off Somalia. (Photos: Xinhua)

Missile destroyer Changsha returns to a port in Zhanjiang, south China's Guangdong Province, June 29, 2021. A Chinese naval fleet returned to a military port in Zhanjiang on June 29, after concluding escort missions in the Gulf of Aden and the waters off Somalia.

Photo taken on May 28, 2021 shows a Chinese merchant vessel being escorted by missile destroyer Changsha (rear) of China's 37th naval escort fleet. A Chinese naval fleet returned to a military port in Zhanjiang on June 29, after concluding escort missions in the Gulf of Aden and the waters off Somalia.

Photo taken on March 13, 2021 shows a scene of firing training of China's 37th naval escort fleet. A Chinese naval fleet returned to a military port in Zhanjiang on June 29, after concluding escort missions in the Gulf of Aden and the waters off Somalia.

A welcome ceremony is held as China's 37th naval escort fleet returns to a port in Zhanjiang, south China's Guangdong Province, June 29, 2021. A Chinese naval fleet returned to a military port in Zhanjiang on June 29, after concluding escort missions in the Gulf of Aden and the waters off Somalia.

Photo taken on April 23, 2021 shows a Chinese fishing boat escorted by China's 37th naval escort fleet. A Chinese naval fleet returned to a military port in Zhanjiang on June 29, after concluding escort missions in the Gulf of Aden and the waters off Somalia.

Photo taken on March 22, 2021 shows a boat transporting materials for China's 37th naval escort fleet. A Chinese naval fleet returned to a military port in Zhanjiang on June 29, after concluding escort missions in the Gulf of Aden and the waters off Somalia.