On the day of the activity, there were only my friends and I in the group. Although it was cloudy and rainy, the sea breeze was very cool and the air was fresh, so it was a good experience. The process was very interesting and meaningful. The instructor was professional and humorous. He deepened our understanding of marine ecology and shellfish. The mining process was guided in detail, and he was also willing to help when making jewelry. My friend and I spent a pleasant morning.