Photo taken on March 23, 2019 shows blooming flowers along the Sijian expressway linking Sinan with Jianhe at Censong Township of Jianhe County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

Photo taken on March 23, 2019 shows blooming flowers along the Sijian expressway linking Sinan with Jianhe at Censong Township of Jianhe County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

Photo taken on March 23, 2019 shows blooming flowers along the Sijian expressway linking Sinan with Jianhe at Censong Township of Jianhe County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

Photo taken on March 23, 2019 shows blooming flowers along the Sijian expressway linking Sinan with Jianhe at Censong Township of Jianhe County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)

Photo taken on March 23, 2019 shows blooming flowers along the Sijian expressway linking Sinan with Jianhe at Censong Township of Jianhe County, southwest China's Guizhou Province. (Xinhua/Yang Wenbin)