The economy of Kachin State is predominantly agricultural. The main products include rice, teak, sugar cane, opium. Mineral products include gold and jade. Hpakan is a well known place for its jade mines. Over 600 tons of jade stones, which were unearthed from Lone-Khin area in Hpakan aka Pha-Khant Township in Kachine State, had been displayed in Myanmar Naypyidaw to be sold in November 2011. Most of the jade stones extracted in Myanmar, 25,795 tons in 2009–10 and 32,921 tons in 2008–09, are from Kachin State. The largest jade stone in the world, 3000 tons, 21 metres long, 4.8 metres wide and 10.5 metres high was found in Hpakan in 2000. The Myanmar government pays little attention to the deterioration of environment in Kachin because of jade mining. There has been erosion, flooding and mudslides. Several houses are destroyed every year. Kachin has deep economic ties with China, which acts as the regions biggest trading partner and chief investor in development project. In 2006, the Prime Minister General Thein Sein made an agreement with the China Power Investment Cooperation in Beijing to build the Myitsone Dam and six others dam in Kachin State. One controversial construction project of a huge 1,055 megawatt hydroelectric power plant dam, the Myitsone Dam, is ongoing. It is funded by China Power Investment Cooperation. When completed, the dam will measure 152 metres high and the electricity produced will be sold to China. This project displaced about 15,000 people and is one of 7 projects planned for the Irrawady River. Bhamo is one of the border trading points between China and Myanmar. Kachin State is served by the following airports: There is a railroad between Myitkyina and Mandalay (through Sagaing). The train will takes 21–30 hours from Mandalay to Myitkyina. Educational opportunities in Myanmar are extremely limited outside the main cities of Yangon and Mandalay. It is especially a problem in Kachin State where over 60 years of fighting between the government and insurgents has displaced thousands of people. The following is a summary of the education system in the state. The general state of health care in Myanmar is poor. The military government spends anywhere from 0.5% to 3% of the country's GDP on health care, consistently ranking among the lowest in the world.