A series of national flag-raising ceremonies is held at the border ports in northeast Heilongjiang province, Oct 1, 2017. In Beiji village in China's northernmost county Mohe, on China's easternmost point Heixiazi Island and in the famous Sino-Russian port Heihe, border defense soldiers raised Five-starred Red Flags to mark the 68th anniversary of the founding of the People's Republic of China. [Photo provided to chinadaily.com.cn]