There are sometimes large-scale evacuations, particularly in the coastal regions of southern China. You should follow the advice of the local authorities. Air travel and other forms of transport can be affected.
1 : to relate to a person or thing The laws pertain to hunting. 2 : to belong to as a part, quality, or function These duties pertain to the office of sheriff.
To make (a thing) certain to the mind; to free from obscurity, doubt, or change; to make sure of; to fix; to determine. The divine law . . . ascertaineth the truth. - Hooker. The very deferring [of his execution] shall increase and ascertain the condemnation.