In early 1980s, HBC, with reference to first Pingwei 600MW project, has successfully introduced the design and making technology from GE on subcritical parameter big capacity boiler, designed and made the first subcritical 600MW boiler in China. On such basis, the boiler burning lignite, bitumite and lean coal has been developed in succession after years of growth. We have designed and made 40-plus boiler, which are successfully exported to India and Indonesia etc.