随声附和 echo
Explanation
指没有主见，别人怎么说，自己就跟着怎么说。形容人缺乏独立思考能力，人云亦云。
Means having no opinion of one's own and simply echoing what others say. It describes someone who lacks independent thinking ability and blindly follows the crowd.
Origin Story
话说唐朝时期，有一位名叫李白的诗人，他特别喜欢在酒桌上与文人墨客吟诗作赋，互相切磋。一次，在长安的一家酒楼里，李白与几位朋友相聚，席间一位朋友正在吟诵一首诗，诗中有一句写道："明月几时有，把酒问青天"。这时，一位自称是诗人的男子站起来，也跟着吟诵起这句诗来，只是他的语气和神态都显得有些拘谨和做作，像是在模仿李白的风格。李白当时微微一笑，并没有说什么。酒过三巡，李白开始吟诵自己新作的诗，众人屏气凝神，仔细聆听着。诗中，李白描绘了他在黄河边上看到的壮阔景象，字里行间充满了豪情壮志。诗诵毕，众人纷纷赞叹不已。但那位模仿李白的男子，却依然没有自己的作品，只是在旁边不停地随声附和，赞扬李白的诗作。众人看到他的这种行为，心里都有些不以为然，认为他不过是在随波逐流，缺乏真正的文学才华。
During the Tang Dynasty, there was a poet named Li Bai who particularly enjoyed composing poems and verses with fellow literati at taverns. Once, at an inn in Chang'an, Li Bai gathered with several friends, and one friend was reciting a poem. A line in the poem was: "When will the bright moon appear? I raise my glass and ask the blue heaven." At this time, a man who called himself a poet also started reciting this line, but his tone and expression seemed rather stiff and affected, mimicking Li Bai's style. Li Bai simply smiled slightly and said nothing. After a few rounds of drinks, Li Bai began to recite his newly composed poem, and everyone listened attentively. In his poem, Li Bai described the magnificent scene he had seen by the Yellow River, filled with ambition and pride. Upon completing his poem, everyone praised it profusely. However, the man who had imitated Li Bai still lacked his own works, merely echoing and praising Li Bai's creation. Those present were unimpressed, considering him to be unoriginal and lacking genuine literary talent.
Usage
常用来形容人缺乏独立思考能力，人云亦云。
Often used to describe someone who lacks independent thinking ability and blindly follows the crowd.
Examples
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会议上，他总是随声附和，毫无自己的见解。
huiyi shang, ta zong shi suis sheng fuhe, hao wu zi ji de jiangjie
At the meeting, he always echoed others' opinions without his own insights.
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对于领导的指示，他总是随声附和，不敢发表不同的意见。
duiyu lingdao de zhishi, ta zong shi suis sheng fuhe, bu gan fabiao butong de yijian
He always echoed the instructions of the leaders and dared not express different opinions.
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一些人盲目跟风，随声附和，缺乏独立思考的能力。
yixie ren mangmu genfeng, suis sheng fuhe, quefa duli sikao de nengli
Some people blindly follow the trend, echoing others, lacking the ability of independent thinking.