The main difference between political economics and economies lies in whether to study produetion relations. Marxist politicaleconomies employs the materialist natural history approach to examine economic relations, whilst contemporary Chinese Marxist politicaleconomies has opened up a new realm of accurately grasping the changes in the main contradictions of Chinese society and the new normal ofChina's economy, and innovating macro-control thinking and approaches. As there are no ends to historical development, so are the developments ofthe new realm of Marxist political economies in modern China. To continuously open up the new realm of contemporary Chinese Marxist politicaleconomices, it is necessary to have a scientifie methodology and a correct way of thinking. Thus, we should focus on both the present and the long-term as well, achieve the Six Perseverance whilst maintaining a critical spirit, in particular, the in-depth study in basic principles of Marxist politicaleconomics and Xi Jinping Thought on Socialism with Chinese Characteristies for a New Era.