The deadly clashes broke out last Monday between troops in the mountainous China-India border area. Beijing said it did not instigate the violence, and asked India to pull back. India's prime minister said his country did not lose any territory in this week's border clash with Chinese troops. CGTN talked about the issue with visiting professor Cheng Xizhong, a former Chinese diplomat in South Asia. Throughout his career, Professor Cheng has focused on the evolution of ties between China and India.