罗伯特·子贺作为一名警官在警察部门服务了25年,他给执法人员和军人传授防身自卫术已有40年了,他最了解危急时刻应如何去自卫求生。子贺从12岁开始学习柔道,后又从师于一位合气道传奇人物门下进行训练。多年来,他花了大量时间对各种类型的格斗功夫进行学习和研究,获得了柔道、合气道 He has been serving as a police officer for 25 years in the police service. He has been teaching self-defense for law enforcement officers and soldiers for 40 years. He knows best how to survive in times of crisis. Heaga began judo training at the age of 12, and then trained under a legendary aikido. Over the years, he spent a lot of time studying and researching various types of martial arts, obtaining judo, aikido