What is the specific shape of the plaque of "Mother's Day Filial Piety" in Zhongshan Gongci, Huangpi Town, Xingning, Guangdong?

There is a plaque of "Mother's Day Filial Piety" on the beam of the main entrance of Zhongshan Temple in Huangpi Town, xingning city, Guangdong. This is an inscription for Liu, the daughter-in-law of the local Shi family, and his son Shi.

This plaque is made of wood, 2 meters long, 0.8 meters wide and 0.4 meters in diameter. The inscription was written by Zhu Yunming, one of the four gifted scholars in Wuzhong in Ming Dynasty, in 15 19. The four sides of the plaque are decorated with the moire pattern of golden dragon plate.

In the middle of the plaque, the characters "Mother's Day Filial Piety" are written in regular script. Because of its elegant brushwork, strong rhyme and strong harmony, it is a rare masterpiece in Zhu Yunming's calligraphy art.