Bamboo,bronze drum and Hulong Mountain are closely connected with the lives of the earlier inhabitants of the Yizu Ethnic Group in Napo County.

Longhu\'s works are characterized by the expression of his frank personality,which enables the audience to merge themselves into his works in their free association and linger around in his mature techniques of painting,achieving physical resonance between the audience and his works with great enjoyment of beauty and taste and infinite artistic edification.

According to case of "the black dragon society" in Guangdong province,the author probes into the reasons of juvenile delinquency in different points of view,such as the material aim of education,the flaws of family education,the disorder of public security administration,and the temptation from sub-culture of crime etc.