求大同，存小异 is an idiom
求大同，存小异qiú dà tóng cún xiǎo yì
seek common ground on major issues while leaving aside the minor differences
在大的、主要的方面取得一致，而对某些小的、次要的问题可以各自保留不同的意见。
Word breakdown for “求大同，存小异”: Open in Reader →
求HSK 2top 500Among the 500 most common words 1.to seek2.to look for3.to request4.to demand+1 more+2 more 1.see 大同市[dà tóng shì]2.see 大同乡[dà tóng xiāng]3.see 大同区[dà tóng qū]4.(Confucianism) Great Harmony (concept of an ideal society)+1 more 存HSK 3top 5kAmong the 5,000 most common words 1.to exist2.to deposit3.to store4.to keep+1 more+2 more 小HSK 1top 500Among the 500 most common words 1.small2.tiny3.few4.young+1 more 异異top 5kAmong the 5,000 most common words 1.different2.other3.hetero-4.unusual+5 more+6 more