Owing to advances in semiconductor technology, many-core processors have been widely used for high-performance computing. Through the support of the national 863 program and the national major project of HeGaoJi, research and development in many-core processors has significantly progressed in China. In this paper, we present a homegrown, many-core processor architecture for high-performance computing systems. The processor is heterogeneous and supports different application features with a unified ISA architecture, a unified execution model, and a share-memory that supports cache coherence. This paper illustrates techniques for solving“memory wall”,“power well”, and“reliability wall”problems in the processor. The prototype chip achieved a peak performance of more than 1 TFlops with four MPEs and 256 CPEs during experimental tests.