Complex sentence: The temple was first designed in 1780 to celebrate the 70th birthday of the Qianlong Emperor and built for Penchen Lama the VI who came to Chengde from Tibet to convey his congratulations, and is a fusion of Chinese and Tibetan architectural style.
Split into simpler sentences: The temple was first designed in 1780 to celebrate the 70th birthday of the Qianlong Emperor. It was built for Penchen Lama the VI who came to Chengde from Tibet to convey his congratulations and is a fusion of Chinese and Tibetan architectural style.