"The Chinese seem to feel that the barrier of mutual suspicions has been coming down faster from their side than from India's." -- greater power normally has greater confidences and shows greater tolerances.
"It won't help in removing concerns over border developments unless there is a distinct change in the attitude of the Chinese political leadership. " -- It applies the same to the Indian side. It won't help in removing concerns over border developments unless there is a distinct change in the attitude of the Indian political leadership.