C177 Aunt Hong's Reminder
It's a thousand years old custom for a woman to deliver a keepsake to a man she loves on this day. If a man loves a woman as well, the man will bring the keepsake with him to propose marriage.
"What does it have to do with me?" Bai Ruotong asked doubtfully.
"A man and a woman who are engaged to each other can also escort their gifts to express their sincerity." Cheng'er continued