Roots and Roofs Side Story Full Walkthrough and Details | Where Winds Meet

The manager of the cargo shop is frantically searching for something.

[1] Talk to Liu Feihu.
・Talking to him will not update your in-game log but will give you context on the quest and indicates that you have to find something.

[2] Find the Pearl Hairpin.

[3] Give the hairpin to Liu Feihu.

[4] Wait one day.

[5] Talk to Liu Feihu.

・Echo Jade x 20
・Kaifeng Exploration x 10
・Coin x 1500
・Character EXP x 1500