The Chinese take the Odd-shape of Gansu Province to resemble Three different auspicious things : Either a swimming gold-fish for its elongated shape with little Fins, Or the Flying Apsarah, the magnificent flying and frolicking "angels of buddhism" from the Marco Polo described Buddhist Caves at Mogao. The Last Shape that Gansu Provinces' outlines may resemble is the Jade RuYi, the S-shaped luxury gift representing the wish of Good Fortune.
Link: Satellite Image with Schematic of the Location and path of the Great Wall of China during the Ming Dynasty. Passes on the Great Wall, including those of the Han & Tang Dynasty Era are depicted.