Once upon a time, in a Chinese folk legend, the seventh day of the first lunar month was designated as the auspicious day for "Rats Wedding." A young grey mouse fell in love with a maiden and decided to propose to her. However, upon seeing his shabby appearance, the maidens family dismissed him hastily. Determined, the little grey mouse disguised himself impeccably and returned to propose again. This time, the maidens parents demanded valuable and lavish betrothal gifts. To their surprise, the resourceful mouse managed to fulfill every request. On the day of the wedding, as he joyfully awaited his bride, he noticed another couple. Among their betrothal gifts was a large, delectable cake. The maidens parents, now greedy, insisted that the mouse provide a cake of equal grandeur as part of his betrothal gifts.