The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)

The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)

The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)

The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)

The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)

The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)

The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)

The Hong Kong Garrison of the Chinese People's Liberation Army (PLA) holds a drill in waters near Hong Kong, June 26, 2019. Members of the army, navy and air force of the PLA garrison in Hong Kong took part in the joint naval and air patrol exercise that aimed to review and raise the units' combat abilities in emergency dispatches, ad hoc deployment and joint operations. (Photo: 81.cn)