Electricity is a secondary energy source. Due to the shortage of primary energy, Bengal power supply has been in short supply for a long time. Built in the 1950s, Bengal Gu La Sau power station was the largest in Bengal with a total installed capacity of 950 megawatts by the early 1990s. Gu La Sau power station is a key project of “ the Belt and Road” in China. Dahua is responsible for upgrading the security system of the power station to ensure the safety and stability of the power station.