I am in Changchun, how to apply for a Singapore visa? I have friends in Singapore.

You can ask your friends to apply for a tourist visa for you. Your friend status must be a Singapore citizen or a permanent resident of Singapore to help you apply, because he is your guarantor. First, fax the first three pages and the last three pages of your passport to your friend, and there are two photos that are the same as your passport (you can scan them and send them to his mailbox for printing), so you don't have to send information and photos. You can apply online or fill in the application form at the Immigration Department (4th floor). It was approved in three days. Just fax the visa to you. Remember to buy a round trip ticket. And remember to fill in the white card on the plane. The stewardess will give it to you.