Anomalies in China
These are all from the same region in mainland China.
What is going on here?

This circle is 0.20 miles in diameter.
In Google Earth fly to:
40°27'31.04"N, 93°18'47.33"E
Note that North is to the up!

This figure is 1.08 by 0.84 miles across.
In Google Earth fly to:
40°27'27.10"N, 93°23'34.79"E
Note that North is to the up!

This figure is 1.15 by 0.65 miles across.
In Google Earth fly to:
40°27'10.12"N, 93°44'37.66"E
Note that North is to the right!