Who knows why there are always planes hovering over Xuchang and Linying recently? (Like an old plane during the war)

You worry too much, in fact, there has always been, but you just don't see it. Those planes are now used for weather observation or agricultural purposes, and usually appear frequently in bad weather, especially in autumn. There is such an airport in the north of Xuchang No.2 Senior High School. I heard that astronaut Nie Haisheng used to be a pilot there.