==>Here the duration 5 weeks means your parents must entry singapore within 5 weeks. Once they arrive in singapore, how long they can stay up to the visa issued at custom. 在进入新加坡的海关处，官员会给批多少天呢？是不是还是可以批30天（机票是30天的），然后父母进来后，马上去延期一个月。这样可以吗？ eith 14 days or 30 days, it depends...no relation to your ticket. 延期是不是只有3个月和5年的两种？ once your parents are in singapore. You can take them to ICA to extend the visa. the 5 years one means long term social visa... PR替父母办签证还需要押金吗？ Mostly no... but it depends.