Lin Wan crocheted a lopsided penguin with her phone number hidden inside. Gu Yan won it at a company gala and kept it on his chair for three years. When Lin Wan was leaving, she asked for the penguin back. Gu Yan then pulled out the faded note, asking for her new number. Lin Wan realized he had long pined for her, collecting her IDs, designs, and voice messages. She gave him her new number, saying, "I'm yours too." The penguin note, a love letter, finally reached him.