A great bougainvillea is in full blossom at the Xiuyuan Campus of Guangxi University in Nanning City, capital of South China’s Guangxi Zhuang Autonomous Region, May 14, 2017. The flowering plant is 24 years old and stands 30 meters tall to form a spectacular ‘flower waterfall’ leaning over a teaching building. (Photo/VCG)

A great bougainvillea is in full blossom at the Xiuyuan Campus of Guangxi University in Nanning City, capital of South China’s Guangxi Zhuang Autonomous Region, May 14, 2017. The flowering plant is 24 years old and stands 30 meters tall to form a spectacular ‘flower waterfall’ leaning over a teaching building. (Photo/VCG)

A great bougainvillea is in full blossom at the Xiuyuan Campus of Guangxi University in Nanning City, capital of South China’s Guangxi Zhuang Autonomous Region, May 14, 2017. The flowering plant is 24 years old and stands 30 meters tall to form a spectacular ‘flower waterfall’ leaning over a teaching building. (Photo/VCG)