 In 1937 for instance he supervised the construction a steel bridge over the Trisum River, about eight miles from Lhasa, on the main trade route from Lhasa to India and western Tibet.Immediately after its completion, Tsarong began planning a more ambitious structure across the Kyichu, the Kyichu Bridge which was to be located east of Lhasa.The project was given the seal of approval from the Tibetan government and Tsarong had organised the purchase of steel girders from Calcutta to be used to construct it.