不需要

fyi http://www.immd.gov.hk/ehtml/hkvisas_7.htm#2 3. PRC passport holders who are in transit through the HKSAR to and from another country or territory may be granted a stay of seven days on each landing without the prior need to obtain an entry permit provided that usual immigration requirements are met, including possession of valid entry facilities for the destination and confirmed onward booking for the overseas journey.

不需要签证1月的时候去过香港，然后从香港到澳门，当天回到香港。都没有申请签证，不过海关只是给7天。

请问去香港自由行要申请签证吗？想去毕业旅行，和同学定了香港4天3夜的行程。但是不知道是不是需要做签证。如果要做的话去哪里做，要多久，多少钱啊？谢谢哦