BEIJING (AFX-ASIA) – Guiguan Electric Power Co Ltd (SHA 600236) said net profit rose 13.21% in 2003 to 292.89 million yuan, against 258.72 million yuan in 2002, with electricity sales increasing 9.9% year-on-year to 666.19 million yuan. (US$1=8.27 yuan). Core revenue increased 6.7% to 677.3 million yuan last year, of which electricity sales accounted for…