evidence: Heilongjiang[a] is a province in northeast China. It is the northernmost and easternmost province of the country and contains China's northernmost point (in Mohe City along the Amur) and easternmost point (at the junction of the Amur and Ussuri rivers). [...] Geography [edit]Heilongjiang is a land of varied topographies. Much of the province is dominated by mountain ranges such as the Greater Khingan Range and Lesser Khingan Range, Zhangguangcai Mountains, Laoye Mountains, and Wanda Mountains. The highest peak is Datudingzi Mountain at 1,690 metres (5,540 ft), located on the border with Jilin province. The Greater Khingan Range contains China's largest remaining virgin forest and is an important area for China's forestry industry. [...] Industry [edit]Heilongjiang is part of northeast China, the country's traditional industrial base. Industry is focused upon coal, petroleum, lumber, machinery, and food.[citation needed] Due to its location, Heilongjiang is also an important gateway for trade with Russia. Since a wave of privatization led to the closure of uncompetitive factories in the 1990s, Manchuria has suffered from stagnation.[citation needed] As a result, the government has started the Revitalize Northeast China campaign to deal with this problem, promoting the private sectors as the preferred method of economic reform.[citation needed]