According to standard practice, the joints between wooden floorboards must be tight and seamless, leaving no gaps. However, if the person who laid the floor was not skilled enough, it might be possible for gaps to appear.
But across the entire room, only this wooden floorboard and its surrounding boards had a gap, so the workmanship of the person who laid the floor couldn't be blamed. It's impossible for the same person's work to result in two different scenarios.
Therefore, this floorboard must have an issue, but what exactly the problem is requires further investigation.
Qin Xuyang tried tapping it with his hand, and the resulting echo confirmed that there was a hollow space beneath the floorboard.
This discovery made Qin Xuyang extremely happy, but he didn't lose his rationality because of it.