At the end with Sidhus final encounter, Hojo throws his stick at Sidhu who breaks it. Then there is a long shot which shows them both before they begin fighting and magically the sticks back at Hojos side again.
Towards the beginning of the film the narrator mentions that the 'The Great Wall of China" is the only man made object visible from Space. However, it has been scientifically proven that for a human being to be able to see "The Great Wall of China" from Space a resolution of 7.7 times better than normal vision would be required, making that statement an impossibility
For multiple times the name of the "legendary warrior" was shown as Liu Sheng. But in the center of the village, there is a statue of him, and his name is inscribed to be Liu Qing. Close pronunciation, but very, very different when written down.
Below the Greatwall there is a monument, which upon Sidhul's arrival was introduced by village leaders to be something like "the tombstone of Liu Sheng the great warrior". But actually what inscribed on the monuments actually means "The Greatwall: Keystone Historical Site of Hebei Province".