People walk in a field at Xujiayuan Village in Jiangning District of Nanjing, east China's Jiangsu Province, March 23, 2020. As weather warms up, tulip and cole flowers in the village bloom amid spring breeze in recent days. (Photo: China News Service/ Yang Bo)

People walk in a field at Xujiayuan Village in Jiangning District of Nanjing, east China's Jiangsu Province, March 23, 2020. As weather warms up, tulip and cole flowers in the village bloom amid spring breeze in recent days. (Photo: China News Service/ Yang Bo)

People walk in a field at Xujiayuan Village in Jiangning District of Nanjing, east China's Jiangsu Province, March 23, 2020. As weather warms up, tulip and cole flowers in the village bloom amid spring breeze in recent days. (Photo: China News Service/ Yang Bo)

People walk in a field at Xujiayuan Village in Jiangning District of Nanjing, east China's Jiangsu Province, March 23, 2020. As weather warms up, tulip and cole flowers in the village bloom amid spring breeze in recent days. (Photo: China News Service/ Yang Bo)

People walk in a field at Xujiayuan Village in Jiangning District of Nanjing, east China's Jiangsu Province, March 23, 2020. As weather warms up, tulip and cole flowers in the village bloom amid spring breeze in recent days. (Photo: China News Service/ Yang Bo)

People walk in a field at Xujiayuan Village in Jiangning District of Nanjing, east China's Jiangsu Province, March 23, 2020. As weather warms up, tulip and cole flowers in the village bloom amid spring breeze in recent days. (Photo: China News Service/ Yang Bo)