"She called me to pick up her at the railway station and drove her to Sun's home at that night. In fact, there was another lady with the DCO at the station. She was the BCA (Blood Collection Assistant). "

"Before we entered the test room, the DCO asked me to escort Sun into the bathroom. As my understanding, she was asking me to watch Sun Yang urinating. Because both of them were ladies, I agreed," recalled the builder.

"Sun is a big star in China and it was my first time being near him. I was excited. I took a couple of pictures outside the room with my cellphone. When I tried to take pictures of him again when we were sitting in the room, Sun told me not to do so."

"Then he asked every one of us to identify ourselves. I showed my ID card. Sun pointed out that I was not an accredited tester and should not stay in the test room," he said.

During the 11-hour marathon public hearing, Sun explained that he stopped cooperating with the test process because of the unprofessional behavior by the DCA. Sun later found out that the three IDTM testers lacked sufficient authorization and credentials.

None of the IDTM doping testers appeared at the CAS public hearing on November 15, prompting Sun to question: "Do you have the guts to show up and tell the truth here in front of the public?"

The DCA said he left the test room and waited in the clubhouse hall, just outside the test room, adding that the DCO came out to him several times with an iPad and showed him its English contents.

"I did not know English and did not understand what was talking about. Then I gave the iPad back to her. I didn't know what happened in the test room," the DCA said.

"I knew nothing about the doping test and nothing about my role that night. I just came to help my middle school classmate at her request. I am a builder," he added.