It means that even if you answer all the questions correctly and appropriately, it is better to remain silent.

Source: Song Dynasty Huang Tingjian's "Poem to Zhang Shuhe": A hundred battles are victorious, it is better to be patient; ten thousand words are worse than a moment of silence.

Interpretation: It means that you can win every battle, but it is better to be patient; you can speak appropriately every time, but it is better to remain silent. Refers to be cautious in words and deeds in order to seek peace of mind.

Extended information:

"A thousand words are worth a thousand words, but silence is better." This was Zhang Tingyu's motto during the Kangxi period:

Zhang Tingyu, also known as Hengchen, also known as Yan. Zhai, a native of Tongcheng, Anhui, was born as a Jinshi. Starting from his father Zhang Ying, three generations of his ancestors and grandsons served in the Qing Dynasty.

In the 39th year of Kangxi (1700), he was promoted to Jinshi, changed to a commoner, awarded the title of review, and entered the South Study Room, entering the center of power. In the Kangxi Dynasty, he was promoted to Zuo Shilang of the Ministry of Punishment, where he rectified the administration of officials. After Emperor Yongzheng came to the throne, he successively served as the Minister of Rites, the Minister of Hubu, the Minister of Officials, the Grand Scholar of Baohedian (chief assistant of the cabinet), the Chief Minister of Military Aircraft, etc., and perfected the Military Aircraft Department system. After Emperor Qianlong came to the throne, the emperor and his ministers gradually became suspicious. His later life was miserable, and he returned home after becoming an official.

He died at home in the 20th year of Qianlong (1755) at the age of eighty-four. He was given the posthumous title "Wenhe" and was entitled to the Imperial Ancestral Temple. He was the only Han official in the entire Qing Dynasty to be eligible to enjoy the Imperial Ancestral Temple.

Zhang Tingyu successively served as editor of "Personal Campaign to Pingding Shuobei", deputy chief editor of "Provincial Grand Ceremony", "Records of the Holy Ancestors of the Qing Dynasty", "History of the Ming Dynasty", "History of the Four Dynasties", "Qing Hui" "Classic" and "Records of King Sejong".

Baidu Encyclopedia-Zhang Tingyu