Since ancient times, making cakes like fingers or tongues on Tanabata is called "clever eating". Women and children wear "Qiao Shi" in strings with colorful threads and throw them on the roof, indicating that magpies are allowed to take the title to bridge the bridge, and the cowherd and the weaver girl meet at night. At the same time, women should also put on "clever food" and fruit, and weave fragrant bags with embroidered thread to make clever fights. Now, although some places still have the custom of eating "smart food", "smart food" is mostly snacks like old lady cakes bought from shops.