Historically, China's cultural sphere has extended across East Asia as a whole, with Chinese religion, customs, and writing systems being adopted to varying degrees by neighbors such as Japan, Korea and Vietnam. Through its history, China was the source of many major inventions. It has also one of the world's oldest written language systems. The first evidence of human presence in the region was found at the Zhoukoudian cave. It is one of the earliest known specimens of Homo erectus, now commonly known as the Peking Man, estimated to have lived from 300,000 to 780,000 years ago.
On 1 January 1912, the Republic of China was established, heralding the end of the Qing Dynasty. Sun Yat-sen of the Kuomintang (the KMT or Nationalist Party) was proclaimed provisional president of the republic. However, the presidency was later given to Yuan Shikai, a former Qing general, who had ensured the defection of the entire Beiyang Army from the Qing Empire to the revolution. In 1915, Yuan proclaimed himself Emperor of China but was forced to abdicate and return the state to a republic when he realized it was an unpopular move, not only with the population but also with his own Beiyang Army and its commanders
