Xiamen's well-designed design plan, which was bored at home, was inadvertently inserted, and was finally shortlisted by accident. It mainly revolves around the deeds of a large number of people from southern Fujian and eastern Guangdong who went to Nanyang at that time. Overseas Chinese criticism (approval letter) became the emotional sustenance and bond at that time. Every letter sent by the trustee traveled across the sea, not far away. Here, a letter is a boat, full of extremely sincere feelings.