The PLA Hong Kong Garrison on Friday held a grand ceremony to see off their comrades-in-arms. More than 200 officers of the land, sea and air forces bid farewell to Hong Kong and returned to the Chinese mainland. This is the 21st batch of PLA officers to leave Hong Kong since its return to China. During their stay in Hong Kong, they successfully completed their defense mission and were highly praised by Hong Kong compatriots and people from all walks of life.