Sentences expressing respect to teachers scroll along the screen of a building in Shanghai on Sept 9, 2019, a day before the country celebrates Teachers' Day. (Photo: VCG)

"Hello teachers" lights up buildings in Zouping, East China's Shandong province on Sept 9, 2019. (Photo: VCG)

An aerial photo shows students standing in the Chinese characters for "hello teachers" at a vocational school in Yangzhou, East China's Jiangsu province on Sept 9, 2019. (Photo: IC)

Students from Shapingba Primary School perform a dance to express their respect and gratitude to teachers in Southwest China's Chongqing on Sept 9, 2019. (Photo: VCG)

"Hello teachers" appears on a screen in downtown Beijing on Sept 9, 2019. [(Photo: VCG)

A meeting is held on Sept 9, 2019, in Kunming, Yunnan province, to honor the excellent commitment and work of rural teachers throughout the province. (Photo: VCG)