In the 1950s, the company conducted close technical cooperation with former Soviet Union experts, and implemented the first Five-year Plan and the Second Five-year Plan of the state; in the 1960s and 1970s, the company participated in economic aid projects in Romania, Vietnam and other Third World countries; while since 1980s, the company has launched extensive technological exchanges and cooperation with many countries in the world; from 1990s, it began to undertake massive consulting, design and general contracting of joint ventures and foreign engineering; after entering the 21st century, the company has come into a stage of all-round development in the fields of project contracting, exports of complete sets of equipment and materials and labor exports, and achieved outstanding achievements, which won a great reputation in Southeast Asia, South Asia, the Middle East, Africa, Latin America, Europe and other international markets.