Visa Inquiry for a Namibian citizen but in Ukraine

You will plan to live with your friend or stay in a hotel in China?
In general, you need to apply for a single entry Tourist L.
If you want to stay with your friend, you need to ask your friend to issue you an invitation letter. Then with it and your valid passport, an application form with a recent taken photo, your proof of legal status in Ukraine you can apply for a Tourist L.

if you are first time to china,you have to apply business invitation letter from china.