Hongkong-listed liquefied petroleum gas company Panva Gas said its first-quarter net profit rose 23% to HK$46.211 million on a 18% rise in revenue to HK$411.238 million. (US$1=HK$7.78). However, diluted earnings per share fell 5% to HK4.53 cents. The company said its wholesale LPG business, which accounts for 55% of total revenue, grew 4% year-on-year to…