Indeed, through experimentation, these experts had proved that most sandalwood incense in the world had no sleep-aiding effect.
These experts had done something for everyone. At least none of the insomniacs had run off to buy sandalwood in an attempt to help them sleep.
However, someone later revealed that among these experts, two of them had become the developers of a certain medicine called "Divine Granule". This was intriguing.
Now, Qin Lin saw that the sandalwood produced by the system indeed had the attribute of increasing sleep. In other words, sandalwood was indeed beneficial to sleep in reality. Otherwise, this additional attribute wouldn't have appeared in the system.
This might be because sandalwood wasn't really completely ineffective against sleep. It was only because most of the sandalwood on the market was too low-level or simply fake that it wasn't effective. Then the experts took advantage of the opportunity.