A chef presents his skills of making hand-pulled Lamian noodles during a cooking contest in the Ledu District of Haidong City, northwest China's Qinghai Province,Sept. 18, 2018. (Xinhua/Zhang Hongxiang)

Chefs participate in a cooking contest in the Ledu District of Haidong City, northwest China's Qinghai Province,Sept. 18, 2018. (Xinhua/Zhang Hongxiang)

A chef presents his skills of making hand-pulled Lamian noodles during a cooking contest in the Ledu District of Haidong City, northwest China's Qinghai Province,Sept. 18, 2018. (Xinhua/Zhang Hongxiang)

A chef presents his skills of making hand-pulled Lamian noodles during a cooking contest in the Ledu District of Haidong City, northwest China's Qinghai Province,Sept. 18, 2018. (Xinhua/Zhang Hongxiang)