We provide training in Chinese and English to more than 5000 professionals from more than 30 countries around the world through online and face-to-face teaching. Our Chinese and English textbooks adopt the latest professional knowledge and technology, best practices, industry standards and local applicable laws and regulations. Lecturers of the course have obtained professional qualifications in the United States, such as American Certified Safety Engineer, American Certified Industrial Hygienist, etc., and have rich industry experience. Face to face courses can be open classes or customer internal training. Online teaching adopts students' participation and sharing. Measures such as creating a learning atmosphere, real-time question answering, case discussion, and timely evaluation can be taken to ensure the learning effect.