Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)

 

Performers form human towers during the Smithsonian Folklife Festival in Washington D.C., the United States, on July 6, 2018. (Xinhua/Liu Jie)