Is it possible for a criminal in Wujiang, Jiangsu Province to reduce his sentence by more than three years this year?

Whether a criminal serving a sentence can reduce his sentence depends on the provisions of the second paragraph of Article 221 of the Criminal Procedure Law of People's Republic of China (PRC), the first and second paragraphs of Article 362 of the Supreme People's Court's Interpretation on Several Issues Concerning the Implementation of the Criminal Procedure Law of People's Republic of China (PRC), and the first and second paragraphs of Article 78 of the Criminal Law of People's Republic of China (PRC).