I Don't Want to Be the Princess

More than a thousand years ago, the Murong Family of Dayan Empire were hunted down by the rebel army. Murong Xi fled to the forbidden area while the time-space tunnel opened. An imperial maid rescued him by pushing him into the time-space tunnel and Murong Xi came to the modern society more than a thousand years later. In order to find a way to restore his country, he accidentally met Tai Xiao Mei and got to know her, the owner of the beverage shop. Because he didn't understand the etiquette of modern people, Murong Xi offended Tai Xiao Mei and gave her his family heirloom jade pendant to apologize. Tai Xiao Mei saw him living on the street homeless and felt bad, so took him in. In order to annul the marriage contract with Zhang Yang, Tai Xiao Mei asked Murong Xi to pretend to be her boyfriend, thus a sweet love story begins.
(Source: Q1Q2 Chinese Drama Channel YouTube)