(2) In view of the rapid development and changes of society, people of insight have expressed their views one after another, and gradually formed many schools (a hundred schools of thought contend); There are fierce debates among various factions, writing books and expounding their own opinions and political views, forming a situation of "a hundred schools of thought contend".

(3) Anqiu City. Gongye Chang, son-in-law of Confucius, is one of the seventy-two sages of Confucius' disciples. He came from Lu at the end of the Spring and Autumn Period. According to legend, he knows bird language and lives in seclusion as a scholar. Answer only one point that is in line with historical facts. )

(4) Affirmation: Well done, the excellent moral character of respecting teachers and attaching importance to teaching is worth carrying forward. Negative: inequality between teachers and students, feudal dross is not worth promoting. Answer yes or no, as long as it makes sense.