Zhang Wei. According to official website of Luyou Education, Zhang Wei, nicknamed "Second Senior Brother", is a national first-class constructor, and his subject is "Construction Management of Construction Projects". He has been engaged in the examination and research of construction workers for many years and has published many reference books. Luyou Education was established in 2005, mainly engaged in vocational examination training and vocational skills upgrading training services, covering construction engineering, fire safety, medicine and health, finance, taxation, recruitment of teaching resources, economic management, rehabilitation skills, legal examination, civil service examination, CET-4 and CET-6 postgraduate entrance examination, continuing education and other fields.