Zheng He, a great navigator in Ming Dynasty, once visited many countries and districts in the Pacific Ocean and India Ocean for seven times and the most remote destination among which was on the coast of Africa. His fleet was composed of more than 240 ships on his first voyage, which showed that the navigation technology and sailing distance were advanced all over the world at that time. The voyage of Zheng He positively promotes the development of overseas trade and the spread of Chinese civilization among countries and people still commemorate his great feats by literature and films.
Co-bike is a kind of service of sharing bike on campus, neighborhood as well as commercial area. People can unlock the bike at any time, provided they pay for the expense after the ride. A new connotation of sharing economy is endowed with sharing bike, for such service not only facilitates the way people live, but also represents a low-carbon and healthy lifestyle. Nowadays, more and more people begin to join the ranks of co-bike to make their own contribution for environmental protection.