China's central bank is right to tame high credit growth in the world's second largest economy and not doing so would have long-term negative consequences, a senior official at credit ratings agency Moody's Investors Service told CNBC on Wednesday.

A credit squeeze in Chinese money markets that has fueled worries about the outlook for China's economy has dealt a blow to financial markets this week. On Tuesday, the People's Bank of China (PBOC) aimed to soothe the concerns by saying it would guide rates to reasonable levels.