Notes:

1) "Maritime" is mainly responsible for the seaworthiness of international vessels, qualification check of their crew and the security of the nearby waters, sailing lanes and navigations of vessels.
Maritime department's range:

2) "Frontier Inspection" is mainly responsible for the entry & exit inspection, as well as the monitor of international vessels and their crew.
Frontier inspection department's range:

3) "Inspection & Quarantine" mainly conduct sanitary inspection of epidemic, sterilization of animal, plant and pest as well as the check of commodities for the entry & exit of international vessels and their crew.
Inspection & quarantine department's range:

4) "Customs" is responsible for the supervision, control and check of the luggage and commodities of the international vessels and their crew.
Customs department's range: