







先入为主 is a Chinese idiom (chengyu) meaning “to be prejudiced by a preconceived idea or initial impression, making it difficult to accept different opinions later; to let a first impression dominate one's judgment”. Literally, “First in, takes precedence; preconceived notions dominate”.
During the Han Dynasty, Emperor Ai greatly favored Dong Xian, Sun Pang, and Xi Fugong, granting them marquis titles.
Prime Minister Wang Jia advised the emperor against this, warning that such actions could lead to future calamities.
Xi Fugong, concerned about Dong Xian's ever-increasing power, then urged Emperor Ai to launch a military campaign against the Xiongnu.
Wang Jia once more intervened, cautioning the emperor not to be prejudiced by Xi Fugong's initial suggestion, emphasizing that peaceful coexistence should always be the priority.
Eventually, Xi Fugong's schemes were exposed, leading to his downfall and the ruin of his entire family.

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Open the tool →先入为主 (xiān rù wéi zhǔ) is a Chinese idiom (chengyu) meaning “to be prejudiced by a preconceived idea or initial impression, making it difficult to accept different opinions later; to let a first impression dominate one's judgment”.
先入为主 is pronounced xiān rù wéi zhǔ in Mandarin Chinese.
Literally, 先入为主 means “First in, takes precedence; preconceived notions dominate”. It is used to mean “to be prejudiced by a preconceived idea or initial impression, making it difficult to accept different opinions later; to let a first impression dominate one's judgment”.
先入为主 comes from a classical Chinese story dating back to ancient China. The full story is on this page.
指先听进去的话或先获得的印象往往在头脑中占有主导地位,以后再遇到不同的意见时,就不容易接受。