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.

The word means black dragon.

Ecological Security Evaluation of Heilongjiang Province with Pressure-State-Response Model;

Fluid inclusions in breccia-type copper-gold ore bodies of Jinchang gold deposit,Dongning County,Heilongjiang Province;

Genesis and clue for prospecting of Sishanlinchang gold-silver deposit in Jidong of Heilongjiang;

Study on Characteristics of Ore-Forming Fluid in Shabaosi Gold Deposit,Heilongjiang Province;

Ordovician turbidite and its potential in gold exploration in Heilongjiang Province;

Pyrite ore body of the Heilongdong pyrite deposit in Huzhou city deposited in flint limestone of Hang-long formation three member (C2h3)and dolomitic marble of Hanglong formation two member(C2h2),which is Carboniferous system.

Dental caries and fluorosis among 12-year-old children with different fluoride exposure in Heilongjiang province;

Discussion on strategies of labor transfer in Heilongjiang province based on industry innovation;

Sustainable Development Strategy for Rice Irrigation in Heilongjiang Province;