San Francisco Mayor Ed Lee (1st L) and Chinese Consul General in San Francisco Luo Linquan (2nd L) raise Chinese national flag at San Francisco city hall, the United States, Sept. 30, 2016. The municipal government of San Francisco hosted the flag-raising ceremony here to celebrate the 67th anniversary of the founding of the People's Republic of China on Friday. Mayor Ed Lee also announced Oct. 1 this year as the city's Chinese-American Friendship and Heritage Day. (Xinhua/Liu Yilin)