不骄不躁不嚣张不哭不闹不炫耀
[bù jiāo bù zào bù xiāo zhāng bù kū bù nào bù xuàn yào]
It translates directly to 'no arrogance, no impatience, not being ostentatious, not crying, not yelling, and no flaunting', reflecting someone wishes themselves or their image to appear matured, modest and calm at all times, emphasizing a non-flashy or humble way to live.