![A participant attends a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)](http://www.ecns.cn/hd/2019/06/04/0d22310b1b0241e9a8c49b8b93160b3b.jpg)
A participant attends a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)
![A participant attends a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)](http://www.ecns.cn/hd/2019/06/04/3203cbe476f54ae583e30ffe7136facf.jpg)
A participant attends a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)
![A participant attends a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)](http://www.ecns.cn/hd/2019/06/04/a6b84031c1c241d5855257919abf37b6.jpg)
A participant attends a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)
![Participants attend a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)](http://www.ecns.cn/hd/2019/06/04/4c55b316bb7845a99b0939219e88067a.jpg)
Participants attend a regional?tractor?racing competition Bizon-Track-Show outside of Rostov-on-Don, Russia June 2, 2019.(Photo/Agencies)