The assistant played the video back to one minute ago. Lily was leaning against the glass wall, speaking in a tired manner. “Don’t hit the wall. It hurts.”

Then she said, “Talking might be tiring  but the Lighthouse is more interesting than the Garden of Eden.”

Just then, Sinan regained a brief sense of soberness and his lips, covered with fur and thorns, tapped gently on the glass.

Lily said, “You’re awake.”

The limbs trembled gently and knocked several times in a row. The doctor raised his eyebrows. “Replay it at 0.5 times the speed.”

The screen zoomed in and slowed down, focusing on the tapping on the glass.

“The interval between the first and second taps is the same. Then there is a long pause before there is a tap and another long pause.” The doctor took out a notebook and quickly wrote in it with a pen. “After this pause, it taps three times in succession at the same interval.”

He recorded the numbers 2, 1, 3 on the paper.

Once the video finished, the doctor said, “Play the next video where it is sober.”

The assistant started to adjust the pace. He looked like a Ph.D student as he asked, “Do you suspect it is delivering a message with the frequency of tapping?”

The doctor muttered, “This absolutely isn’t normal… but he is just a six year old child.”

He asked An Zhe, “What do you teach in your math and logic courses?”

An Zhe replied, “Arithmetic, geometry and reasoning.”

“Do you tell them any extracurricular stories? For example, radio codes or something.”

Then he continued without waiting for a reply. “No. He didn’t get into Class A so he wouldn’t have such a high IQ.”

An Zhe told him, “He gets full marks on his test papers. He couldn’t enter Class A due to a psychological factor.”

The doctor nodded to show he understood and started watching the next video. In the video, Sinan’s time of awareness was short and he quickly knocked twice at different intervals than before. The doctor wrote two points on the paper that were very close together. “The next video.”

In the next video, Sinan knocked seven times at the same time interval.

In the next video, Sinan was aware for a full five seconds. The first half of the video was amazingly consistent with the first video: 2. 1. 3. Once the third tap was completed, he paused for a short period of time and then quickly tapped twice. This video was like the first and second ones were joined together.

The doctor recorded it in his notebook and the video continued to play. In the fifth video, he tapped seven times in a row. In all subsequent sober episodes, his tapping maintained such a cycle until 5 o’clock when Lily was taken back to the Garden of Eden.

The doctor’s notebook recorded a string of numbers.

2, 1, 3, 1, 1, 7, 2, 1, 3, 1, 1, 7, 2…