 Rating Action: Moodys assigns first-time A2 rating to China Huaneng Group Co., Ltd. Hong Kong, September 27, 2019 -- Moodys Investors Service has assigned a first-time A2 issuer rating to China Huaneng Group Co., Ltd. CHGC. CHGCs ba1 BCA reflects its leading position as one of the five largest power generation companies in China, with a diversified fuel mix and geographical spread, says Boris Kan, a Moodys Vice President and Senior Credit Officer. 