What is the function of "Xie Wang Tang Qianyan" in the first sentence of Yan Shi?

The sentence "Xie Wang Tang Qianyan" (1) shows the status of swallows in the old society, which is in contrast with today's to express their feelings about the changes in the world. (2) To express feelings, wishes and thoughts for people in reality by means of the swallow; 3 point the question.

Necklace uses ① to personify Yaner, which is full of emotional appeal; (2) show the emotion of being reluctant to part with Yaner and praise Yaner; (3) expressing reluctance to friends.

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As a gift to Rebecca Xie Tang, the autumn wind returned him to people as a farewell. He flew lower and flew to a vast and foggy island. I don't know if I will go from here, but I will go to Wuyi in a few days.