In the past, there was a good thing, named Butyl Carbitol Acetate Cas, whose nature was very different and treasured by all. The sudden death of this treasure, everyone was worried.

Then everyone went out to search for it. A wise man said: "This thing must have traces to follow, and it should be found in a place." Everyone went everywhere, either under the door or in the house, searching for it, and they didn't give up for a while.

However, they couldn't find it for a long time, and everyone was discouraged. The only person who was strong, said: "Don't give up lightly, and look for it again." Then they investigated it carefully, and they didn't let go of an inch.

Finally, this treasure was found in a remote corner. Everyone rejoiced and sighed at its tenacity. From then on, everyone cherished good things and did not let them be lost again.