I am Ukrainien and got invited by my friends from China (they are getting merried)

Invitation letter is required. It should include following details:
(1) Information on the applicant (full name, gender, date of birth, etc.)
(2) Information on the planned visit (arrival and departure dates, place(s) to be visited, etc.)
(3) Information on the inviting individual (name, contact telephone number, address, signature of the inviting individual)