Study on the present situation and countermeasures of Hulan county's animal husbandry ecological environment;

Immigration and Agricultural Exploitation in Hulan Region of Qing Dynasty

Analysis on sustainable land use and coordination degree of Hulan District in Harbin City

Present Situations and Protection Countermeasures of Mining Ecological Environment in Guoluolongwa Gold Mine,Dulan,Qinghai Province;

Present Situations and Protection Countermeasures of Mining Ecological Environment in Dulenggou Copper-cobalt Deposit of Dulan;