請問簽證是什麼？什麼時候什麼情況需要簽證？ 我有辦護照跟台胞證要坐飛機先飛到香港機場, 入境後不停留, 馬上搭車到深圳，但回國時從深圳到香港，我想在香港逛幾個小時的話是需要辦簽證嗎？若台胞證為單次簽要加簽嗎？ 我在香港附近到處逛逛買東西而已沒簽證他會知道嗎？謝謝?

1. A visa is an official proof of pre-authorized travel by a country.

2. In 2 situations, you will need a visa:

a. When you are not pre-authorized to travel into a country (i.e. no visa-free privilege);

b. Your travel will not covered by the pre-authorization.

3. Yes.

4. Then you will need the new permit.

5. Yes, as you will return to Hong Kong via Shen Zhen and be subject to immigration control.

持台胞證到大陸已取消簽證，所以你只要台胞證有效期內都可以出入境大陸。
你有台胞證入境香港不需要簽證，只要填寫入境單，可以停留30天。