进 pairs 井 jǐng as a sound part with 辶, which carries the idea of moving along a road. Its first meaning was 'to go forward, advance'. That grew to 'to enter'.
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Example Sentences
请进,里面有很多好吃的。
qǐngjìn , lǐmiànyǒuhěnduōhǎochīde 。
Please come in, there are many delicious foods inside.
他每天都进图书馆学习。
tāměitiāndūjìntúshūguǎnxuéxí 。
He goes into the library to study every day.
比赛结束后,他进了决赛。
bǐsàijiéshùhòu , tājìnlejuésài 。
After the competition ended, he advanced to the finals.