HEC HBC developed and made its first high temperature and high pressure parameter 410t/h boiler configured for 100MW turbine generator set in the early 1960s, and furnace burning anthracite, bitumite, meagre coal, lignite, oil and gas is developed in succession, when the complete furnace series takes shape. We have made 100-plus set to date. On such basis, we developed such high pressure boiler types as 460t/h and 480t/h in succession to meet the demand of chemical plant. After 1980s, with the introduction of subcritical boiler technology, HBC improved and re-developed the 100MW boiler, which significantly improves its performance and operation reliability.