french people apply a china visa

i m from Hong kong,and my bf is french,and we plan to join my cousin wedding in Nov,what do my bf need to apply the visa to china?

is it apply the L visa?but we have not marriage ,what is this invitation letter?what imformation we need ?
thanks!

L visa for Family Visiting: Besides the documents mentioned above as for tourism, invitation letter and the proof of kinship relationship (Marriage License and Birth Certificate) are required, as well as a copy of inviter's ID (Chinese), or copies of inviter's passport information page, Work Permit and Residence Permit (Foreigners).