The link pic1.xilu.com/1/3118/6237719/eb38a9f9bbe7be0a8e3358dcba1e4da0.jpg is failed.
Please see pic1.xilu.com/1/3118/6237719/d6c698c33153555f2d41488b9769ec82.jpg

Please seriously consider, if you think that the counterclockwise light will return point O earlier than the clockwise light with time discrepancy about 0.02%，so the planet's surface is divided into innumerable equal parts, it also takes them unequal time to go through each part; ie clockwise and counterclockwise speeds of light are unequal. If it were true, then the ether wind with velocity of 30 km / s could be detected by Michelson-Morley experiment.
Do you think so?