BEIJING (AFX-ASIA) – Huaneng Power International Inc (SH A 600011; HK 0902; NYSE HNP) said its net profit for the first half of 2003 rose 29.37% to 2.356 billion yuan on increased electricity sales. (US$1=8.27 yuan). Huaneng said four power plants it purchased last year and two new power generators that started operations increased its…