PTT is the abbreviation of English "Professional Trainer Training", which means "training of professional trainers". It is a classic of American International Training Association's vocational training, the PTT-2 1 Century China Vocational Trainer's Entry Certificate (issued by the authoritative certificate), and a compulsory course for professional managers in the world's top 500 enterprises. This course provides comprehensive professional training for trainers according to internationally accepted professional standards, and issues authoritative international professional certification.