The most important industrial project from the Sino-German co-operation was the 1936 Three-Year Plan, which was administered by the Chinese government's National Resources Commission and the Hapro corporation. Its purposes were to create an industrial powerhouse that could resist Japan in the short run and create a centre for future Chinese industrial development for the long run. It had several basic components, such as the monopolisation of all operations of tungsten and antimony; the construction of the central steel and machine works in Hubei, Hunan, and Sichuan; and the development of power plants and chemical factories. Cost overrun for the projects was partly assuaged by the fact that the price of tungsten had more than doubled between 1932 and 1936. Germany also extended a 100 million Reichsmark line of credit to the Kuomintang. The Three-Year Plan introduced a class of highly educated technocrats to run the state-owned projects. At the height of the programme, trade with Germany accounted for 17% of China's foreign trade and China was the third largest trading partner with Germany. The Three-Year Plan had many promises, but many of its intended benefits would be undermined by the start of the Second Sino-Japanese War.