党同伐异 Party with the same and attack the different
Explanation
党同伐异，指结帮分派，偏向同伙，打击不同意见的人。这个成语一般用来形容人固执己见，排斥异己，不善于听取别人的意见。
Party with the same and attack the different, refers to forming factions and parties, favoring one's own group and attacking those with different opinions. This idiom is generally used to describe people who are stubborn, reject those who disagree with them, and are not good at listening to others' opinions.
Origin Story
在汉朝，汉武帝时期，为了加强中央集权，采取“罢黜百家，独尊儒术”的政策。这导致许多儒学学派开始争权夺利。在汉宣帝时期，因为儒学学派的争论日益激烈，汉宣帝下令在黄家藏书楼举行了一次大规模的儒学讨论，史称“石渠阁会议”。 然而，这次会议并没有达到预期目的，反而加剧了儒学学派之间的矛盾。 很多儒生为了维护自己的观点，开始结党营私，攻击那些持不同观点的儒生。最终，这次会议变成了各派别之间的争斗，而没有起到真正促进儒学发展的效果。这反映了“党同伐异”的思想，它不利于学术交流，不利于思想的进步。
In the Han dynasty, during the reign of Emperor Wu of Han, in order to strengthen central authority, the policy of "eliminating all other schools of thought and upholding Confucianism" was adopted. This led to many Confucian schools beginning to vie for power and influence. During the reign of Emperor Xuan of Han, because the debates among the Confucian schools became increasingly fierce, Emperor Xuan ordered a large-scale Confucian discussion to be held at the Yellow Family Book Repository, known as the "Stone Chamber Pavilion Conference." However, this conference did not achieve its intended purpose and instead exacerbated the contradictions between the Confucian schools. Many Confucian scholars, in order to defend their own views, began to form factions and attack those who held different viewpoints. In the end, this conference became a fight between factions, and did not truly contribute to the development of Confucianism. This reflects the ideology of "party with the same and attack the different", which is not conducive to academic exchange and the progress of thought.
Usage
这个成语主要用来形容人固执己见，排斥异己，不善于听取别人的意见，或指在处理问题时，不顾大局，只顾偏袒自己一方，打击对方，造成两败俱伤的局面。
This idiom is mainly used to describe people who are stubborn, reject those who disagree with them, and are not good at listening to others' opinions, or to refer to the handling of problems where one ignores the overall situation, only favors one's own side, attacks the other side, and thus leads to a situation where both sides lose.
Examples
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在工作中，要团结一致，不能党同伐异。
zai gong zuo zhong, yao tuan jie yi zhi, bu neng dang tong fa yi.
In work, we should unite as one and not exclude those who have different opinions.
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对于不同意见，我们应该包容，不能党同伐异。
dui yu bu tong yi jian, wo men ying gai bao rong, bu neng dang tong fa yi.
We should be tolerant of different opinions and not exclude those who have different opinions.
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一些人喜欢党同伐异，这不利于团队的进步。
yi xie ren xi huan dang tong fa yi, zhe bu li yu tuan dui de jin bu.
Some people like to exclude those who have different opinions, which is not conducive to the team's progress.
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在学术讨论中，我们应该抱着开放的心态，不要党同伐异。
zai xue shu tao lun zhong, wo men ying gai bao zhe kai fang de xin tai, bu yao dang tong fa yi.
In academic discussions, we should have an open mind and not exclude those who have different opinions.
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党同伐异会阻碍思想的碰撞，不利于创造性思维的产生。
dang tong fa yi hui zu ai si xiang de peng zhuang, bu li yu chuang zao xing si wei de chan sheng.
Excluding those who have different opinions will hinder the collision of ideas and be detrimental to the generation of creative thinking.