China Life Insurance Co., the largest life insurer in China, has disclosed a 31% decline in profit for last year as a result of a stock market downturn and lower bond yields impacting its investment returns. The net income decreased to 46.2 billion yuan ($6.4 billion) compared to 66.7 billion yuan in the previous year, as stated by the Beijing-based company in a filing to the Shanghai Stock Exchange on Wednesday. These figures were reported in accordance with international accounting standards following accounting-rule adjustments.