i hold kenyan passport and currently working in qatar, i would like to travel to quanzhou

Hi Mareen, it's OK even though you don't have an invitation letter. You can first get the following things ready, including a valid passport, a copy of the photo page of the passport, a completely filled application form, a recent bare-head photo attached on the form, the original and photocopy of your work permit in Qatar, and itienrary proofs such as round-trip tickets and hotel reservations. Then go to the embassy and apply for an L type.