1. Have lived in Singapore for at least two years.
2. Pass at least one national examination, such as PSLE, Singapore-Cambridge GCEN/O/A level, IP(integrated program) course, etc.
The difficulty depends on the personal situation and the government, but Bian Xiao still suggests that you work for one or two years after graduation before applying, so the chances of getting PR will be higher, but this is to apply as a job! /zd/lx