You get walked over.
Mohammad Siasarani took a swing at Kongthailand. He missed. So Kongthailand walked right over him.
The Thai athlete also reset the position of the ring. He walked around the referee and created more space for himself. When Siasarani kicked, Kongthailand was backed up against the ropes.
So he made Siasarani miss, made a show of domination, and made room for himself.
Smart moves.