The Democratic People\'s Republic of Korea (DPRK) will further improve environment for foreign investment, an official said Friday. It is a consistent policy of the DPRK to enhance economic cooperation with other countries while beefing up its self-reliant national economy, Yun Yong Sok, an official of the Committee for Investment and Joint Venture, told the official KCNA news agency. The government amended a series of investment-related laws last year, such as the Law and Regulations on Foreign Investment, the Law on Hwanggumphyong and Wihwa Economic Zone, and the Law on Rason Economic and Trade zone, said Yun.The development of the two economic zones has been on a healthy track as a result of active efforts by both China and the DPRK, he said. The committee will further ensure the interests of foreign investors and encourage exchanges and cooperation with foreign governments, investors and businesses, said the official. He said the nation\'s economy is gaining momentum, with many industrial establishments and power stations being built across the country.