yǒu xiē qiānzhèng rùjìng hòu xūyào zài guīdìng shíjiān nèi shēnqǐng jūliú xǔkě yǒu xiē bù xūyào

有些签证入境后需要在规定时间内申请居留许可，有些不需要。

Some visas require applying for a residence permit within a specified time after entry, while others do not.