A valid visa for country of final destination, if applicable.

最终目的地国家的有效签证，如适用。

Many countries require you to have a valid visa before arriving.

到达目的地前，很多国家会要求你先办好有效的签证。

XIAO QIN: "Obviously, we prefer to stay here for several years, but if we cannot get any valid visa we have to leave."

XIAO QIN：“显然，我们更愿意在这里停留数年，但如果我们不能得到任何有效的签证，我们不得不离开。”

After all, the police said the suspected British man involved in the incident does have a valid visa. But why start the crackdown now?

而且警察说，此事件中的英籍男子确有合法签证，但是，为什么要在现在清理呢？

When the travelers go into and out of a country, their passports and visas are checked by the customs. One must hold a valid visa to enter the country.

当旅行者外出到另一个国家时，他们的护照和签证都要进行入关检查，必须持有效签证才能入境。