(EnergyAsia, April 4) — Hong Kong-listed Enerchina Holdings Limited said its 2004 net profit rose 39.6% to HK$80.2 million on a 53% jump in revenue to HK$856.4 million over the previous year. (US$1=HK$7.79).   In a statement, chairman Sun Qiang said: “The main reasons for the encouraging performance, despite high world oil prices, are the…