曾经，“明星放弃国籍”这个话题拥有很高的热度，为了平息舆论，明星们纷纷站出来澄清，申请外国籍是为了签证方便。
的确，中国护照在国际社会上的地位并不高，持有某些外国护照就可以免签证到许多国家公干、表演、出游……
那么，究竟哪些国家的护照，可以让该国人民拥有较大的国际旅行自由度？
影响护照地位的因素又有哪些呢？
When it comes to international travel, where you're going may not matter as much as where you're coming from.
That's because different passports allow varying levels of so-called "travel freedom."
While some travelers are able to breeze through customs and stay abroad for months or even years, others are subject to expensive visas, strict time limits or an otherwise heavy vetting process.
So why is there this discrepancy?
Which countries have the most powerful passports?
Well, passports tend to reflect their country's international standing.
That is, countries with mostly positive diplomatic relations tend to have more powerful passports, because the leaders of those countries have jointly signed on to bilateral visa agreements.
For example Afghan passport holders are extremely limited in where they can travel, as the country is embroiled in many international conflicts.
According to the 2017 Passport Index, which ranks countries by the number of nations their citizens can enter without a visa, Singapore has one of the most powerful passports.
Since its founding in 1965, Singapore's foreign policy has been predicated on fostering as many international friends as possible.
