The Exciting Hangzhou Athletic Invitational Tournament is held in Hangzhou, Zhejiang province on July 11. [Photo/hangzhou.com.cn]

The Hangzhou Olympic and International Expo Center, also known as the Big Lotus, hosted its first field and track tournament from July 9 to 11.

The tournament set up 35 competitions and attracted about 400 athletes, including some national team members as the tournament is the last warm-up opportunity before Tokyo 2020.

Fans cheer for athletes at Hangzhou Olympic and International Expo Center on July 9. [Photo/hangzhou.com.cn]

Thousands of audiences came despite the heat and rains to admire the performance of the country's top athletes as well as to have a close look at the interior of Big Lotus, which will function as the main stadium of the 19th Asian Games Hangzhou 2022.

Located on the south bank of the Qiantang River, Big Lotus is the main stadium of Hangzhou 2022 and a landmark of the city. [Photo/hangzhou.com.cn]