Aerial photo taken on Nov. 14, 2019 shows koi fish at a local pet fish breeding company 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)