People queue to buy donuts during the DTLA Donut Festival at Union Station in Los Angeles, the United States, on June 16, 2018. (Xinhua/Zhao Hanrong)

People queue to buy donuts during the DTLA Donut Festival at Union Station in Los Angeles, the United States, on June 16, 2018. (Xinhua/Zhao Hanrong)

Giant donuts are displayed during the DTLA Donut Festival at Union Station in Los Angeles, the United States, on June 16, 2018. (Xinhua/Zhao Hanrong)

A vendor shows variety of donuts during the DTLA Donut Festival at Union Station in Los Angeles, the United States, on June 16, 2018. (Xinhua/Zhao Hanrong)

A boy enjoys his donut during the DTLA Donut Festival at Union Station in Los Angeles, the United States, on June 16, 2018. (Xinhua/Zhao Hanrong)