I m a Nepali citizen n I want to go China. Wat all paper I need to get visa?

Karma, the interview isn't required unless the embassy informs you that an interview is needed. You need to apply for a L type in advance. Except your passport, filled application form and a recent passport photo, you are required to provide your a copy of your passport information page and previous entry records to China (if you have), invitation letter from Chinese individual, companies or organizations, travel itinerary and personal information letter including where you want to visit, inviter's company, name, address and contact information.

If you can't provide the invitation letter, you need to provide your travel itinerary, round-trip air tickets, hotel reservation in China and personal information letter. Your employment certificate or recent six months' bank statement are required too.