Chen Shengshen is an important differential geometer in the 20th century and is known as the "father of differential geometry". As early as 1940s, Chen Shengshen combined the methods of differential geometry and topology, and completed two epoch-making important works: Gauss-Bonne-Chen Theorem and Hermitian Manifold Characteristic Class Theory, which provided indispensable tools for large-scale differential geometry. These concepts and tools have gone far beyond the scope of differential geometry and topology and become an important part of modern mathematics.
Therefore, Chen Shengshen has nothing to do with the sum of the interior angles of the triangle.