What year is the aerial photography of rural houses in Liaocheng, Shandong?

2017.2017 April 18, Liaocheng, Shandong Province, ushered in the sunny weather in Wan Li. The land management department of Liaocheng decided to take aerial photos of houses, and take aerial photos of rural wheat fields, vegetable greenhouses and villages at an altitude of several hundred meters, which was very beautiful and spectacular. The blue sky, green wheat fields and snow-white vegetable greenhouses are patchwork, which set each other off and have distinct levels, just like beautiful rural scenery.