TRAVELLING WITH A CHINESE TO CHINA.

AM A GHANAIAN AND THE SALES MANAGER WITH A CHINESE COMPANY IN GHANA. MY QUESTION IS , OUR ENGINEER WILL BE GOING TO CHINA FOR HOLIDAYS IN AUGUST I WILL ALSO BE ON LEAVE BY THEN, I HAVE DECIDED TO GO TO CHINA WITH HIM SINCE I HAVE NOT BEEN THERE BEFORE. WE DON'T KNOW THE PROCEDURE TO SECURE VISA ESPECIALLY THE INVITATION LETTER BEING TALKED ABOUT. CAN THE CHINESE PERSON AND ME GO TO THE EMBASSY FOR THE VISA OR WRITE THE INVITATION LATTER HERE IN GHANA. PLEASE ADVICE SOON THANKS