Aerial photo taken on Nov. 14, 2019 shows a staff from a local pet fish breeding company feeding koi fish in Zhenping County of Nanyang, central China's Henan Province. Based on its advantage in traditional breeding industry, Houji Town in Zhenping County has developed the "pet fish economy" and established a complete industrial chain, as a way to boost local economy and locals' income. (Xinhua/Li Jianan)