Why are Fan and Ouyang Xu keen on sending hairpins on the road? What does it mean to send hairpins in ancient times?

Why are Gu and Ouyang Xu in the TV series "Flower Dream Road" keen on sending hairpins? What does it mean to send hairpins in ancient times? You can see it from the story of TV series.

In the TV series "Flower Dream Road", Gu, on his way to avoid being arrested for performing official duties, came to a stall selling hairpins and pretended to be a customer. The stall owner warmly greeted the fans to buy hairpins. At this time, Gu showed that he looked at Zhao's bun and picked out a fire coral hairpin, but he didn't send it out at this time. Although it didn't come out, Gu stole a look at Zhao's bun after buying this hairpin, but he didn't speak.

When Ouyang Xu decided to abandon Zhao, he also showed a picture? Love is deep? Appearance, said that this Hosta was intended for Zhao, but Zhao Yan refused, and was not deceived by Ouyang Xu's duplicity.

So, why are Gu and Ouyang Xu in the TV series "Flower Dream Road" keen on sending hairpins? This also depends on the meaning of sending hairpin in ancient times.

When Gu was choosing, he thought of sending a woman a hairpin in ancient times, which meant a wedding token. Hairpin is one of the symbols of ancient love, which means that a man expresses his love and commitment to a woman. At this time, Gu Cai knew where Zhao was? Fiance? Yes, so he didn't send such a significant token, but carefully put it away. Ou Yangxun insisted on giving him a hairpin, and it was only after he said that he would break off his engagement and marry another bride that he made his attitude clear to Zhao? Broken meaning? And after three things, it seems like this? Deep feeling? The practice is actually posturing. In ancient times, what did it mean to send a new person? Flower hunter? Of course, I know that he is moving his own behavior, making promises easily and breaking his word easily. There is a strong irony in Hairpin Phoenix.