It means business development training. Bd is the abbreviation of business development, which means business development in Chinese. Bd is defined as making and implementing cross-industry development plans according to the company's development, establishing smooth cooperation channels with upstream and parallel partners, communicating with relevant governments, associations and other institutions, seeking support and striving for resources. Training is a way to make trainees master certain skills through training, training and observation. Bd training is usually used for internal training in order to have more professional skills in this field and improve efficiency.