After getting off work and going home, Jing Niu trains his endurance using a fleshlight by himself.

To last longer while filming, after getting off work he directly fixes the fleshlight in place, kneels on the bed and thrusts into it again and again.
Even though he already really wants to cum, he still forces himself to hold back and continue thrusting.

His body gets hotter and hotter, his breathing becomes more and more rapid, yet he still doesn't allow himself to cum so quickly.
This is training to make himself more enduring.💦