After Cheng Yi-chun arrived, he first made a survey of all the island's beaches, and found many traces of turtles coming ashore to lay eggs. There were both old and new tracks, showing that the turtles had landed to lay their eggs over a long period of time. Their landing points were mainly concentrated along the beaches in the southeast of the island.
程一駿抵達之後，先在全島沙灘做調查，結果發現了不少綠蠵龜上岸產卵的足跡，新舊都有，表示綠蠵龜曾經陸續上岸產卵，至於上岸地點的分佈，則以在島東南岸沙灘居多。