Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]

Some 30,000 runners compete in the 2019 CFLD Beijing Marathon race held on Nov. 3, 2019. As has become traditional, runners in cosplay costumes were among the vast array of ordinary runners, diverting much of the limelight away from the elite professional athletes. [Photo by Chen Boyuan/China.org.cn]