https://va.ecitizen.gov.sg/cfp/customerpages/ICA/explorefaq.aspx?Category=80929

Who is eligible to apply for a new Long-Term Visit Pass (LTVP) online?
For New Long-Term Visit Pass (LTVP):

a. Child of Singapore Citizen or Singapore Permanent Residents
b. Parents of Singapore Citizen or Singapore Permanent Residents
c. Spouse of Singapore Citizen or Singapore Permanent Residents
d. Female visitor whose Child / Grandchild is on Student Pass
e. Students of Institute of Higher Learning
f. Visitor Seeking Permission to Deliver a Child in Singapore

You must also satisfy the following conditions:

i. Your Travel Document has a validity of 6 months or more
ii. Your Short-Term Visit Pass has a validity of 10 days or more
iii. Your Local Sponsor has a Singpass and is at least 21 years of age

赶快行动，申请LTVP的时候护照**必须**有至少6个月的有效期。满足这个条件后，批不批主要就看赞助人的条件了。