Bié yīnwèi qǔdé le yīdiǎn chéngjì jiù qīngkuáng qǐlái.
Don't become arrogant just because you've achieved a little.
Tips
usage
轻狂 combines 轻 (light/to take lightly) and 狂 (wild/arrogant). It describes someone who is overconfident and reckless, often because of youth or inexperience.