Complex sentence: 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 but growing concerns over the Chinese meant the project had to be abandoned.
Split into simpler sentences: 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. However, growing concerns over the Chinese meant the project had to be abandoned.