![PLA forces stationed in Hong Kong open a base to the public to mark the 21st anniversary of Hong Kong\'s return to China, July 1, 2018. The Open Day activities included a flag raising ceremony, a military band performance, and a show of combat skills. The PLA Hong Kong garrison has been responsible for the defense of Hong Kong since its return to the motherland in 1997. (Photo: China News Service/Li Zhihua)](http://www.ecns.cn/hd/2018/07/02/559418c15a814dc3a357bd0028e8ae9e.jpg)
PLA forces stationed in Hong Kong open a base to the public to mark the 21st anniversary of Hong Kong's return to China, July 1, 2018. The Open Day activities included a flag raising ceremony, a military band performance, and a show of combat skills. The PLA Hong Kong garrison has been responsible for the defense of Hong Kong since its return to the motherland in 1997. (Photo: China News Service/Li Zhihua)
![PLA forces stationed in Hong Kong open a base to the public to mark the 21st anniversary of Hong Kong\'s return to China, July 1, 2018. The Open Day activities included a flag raising ceremony, a military band performance, and a show of combat skills. The PLA Hong Kong garrison has been responsible for the defense of Hong Kong since its return to the motherland in 1997. (Photo: China News Service/Li Zhihua)](http://www.ecns.cn/hd/2018/07/02/da36b50a2bd74ae3a10a96d04a8867c9.jpg)
PLA forces stationed in Hong Kong open a base to the public to mark the 21st anniversary of Hong Kong's return to China, July 1, 2018. The Open Day activities included a flag raising ceremony, a military band performance, and a show of combat skills. The PLA Hong Kong garrison has been responsible for the defense of Hong Kong since its return to the motherland in 1997. (Photo: China News Service/Li Zhihua)
![PLA forces stationed in Hong Kong open a base to the public to mark the 21st anniversary of Hong Kong\'s return to China, July 1, 2018. The Open Day activities included a flag raising ceremony, a military band performance, and a show of combat skills. The PLA Hong Kong garrison has been responsible for the defense of Hong Kong since its return to the motherland in 1997. (Photo: China News Service/Li Zhihua)](http://www.ecns.cn/hd/2018/07/02/4260157c77ba4d8c8f8eb62b9c84e89f.jpg)
PLA forces stationed in Hong Kong open a base to the public to mark the 21st anniversary of Hong Kong's return to China, July 1, 2018. The Open Day activities included a flag raising ceremony, a military band performance, and a show of combat skills. The PLA Hong Kong garrison has been responsible for the defense of Hong Kong since its return to the motherland in 1997. (Photo: China News Service/Li Zhihua)