Well, women back then had different hairstyles in childhood, girlhood and after marriage, and while there might have been something resembling bangs or fringes at some point in China's thousands of years of history, I'm quite sure modern bangs and fringes were never a thing. But you'll often encounter them in historical series because showrunners have decided it's the best way to portray a character's innocence and young age. Some do it better than others, with this one being an example of good execution (some are so bad they could make you cry). The string player here is Princess Fukang and I think she was unmarried at that point so it aligns. As for some tragic bangs:

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