What is the definition of customs clearance? 通關的定義是什么？
It refers to the act that the people in charge of the inhound or outbound vehicles, consignors and their agents, or the owners of the items make a declaration to the customs about applying for the formalities for their import, export cargoes or items. 通關是指進出境運輸工具的負責人、貨物的收發貨人及其代理人、物品的所有人向海關申請辦理進出口貨物、物品手續。

It refers to the whole process in which the customs officers audit, inspect, collect duty, approve import or export of the documents and the cargo provided by the consignors. 海關通關是指海關對發貨呈交的單證和申請進出口貨物、物品依法進行審核、查驗、征收稅費、批準進出口的全過程。

What formalities do we need to go through to clear the customs? 海關通關都需要什么手續？
It's quite easy, just answer some questions. 很簡單，回答一些問題就行了。
If you are importing or exporting commodities, you have to go through a series of procedures. 要是進出口貨物就要通過一系列的程序。
You have to make a declaration if you have brought something which has to be declared. 假如你有要申報的東西必須申報。

Do you have anything to declare? 請問您有需要申報的東西嗎？
No, I don't. 沒有。
Actually I have no idea about what stuff should be declared. 事實上，我不知道什么東西是需要申報的。
Yes, I have some foreign currency. 有，我有一些外幣。

What are the official formalities in terms of customs clearance? 海關通關的官方手續有哪些？
The inbound or outbound passengers have to enter or depart from the place where a customs office is located so that their personal possessions and belongings can be supervised and managed by the customs office. 進出境旅客行李物品必須通過設有海關的地點進境或出境，接受海關監督。

Passengers ought to make declaration in accordance with the regulations. 旅客應按規定向海關申報。