Does anyone know this Korean drama?

I've seen it. It's Clover starring Lee Hyo Ri and Jin Ryu.

Starring: Lee Hyo Ri, Jin Ryu, Jin Jinghua, Jin Jiangyu and Li Xun.

Zhenya (played by Lee Hyo Ri) is a girl with a hot personality. She has experienced setbacks in her life, but she is optimistic. She was born in a poor family. Her mother ran away, her father committed suicide, her brother made trouble everywhere, and she went to prison for her brother. She couldn't find a good job and had to work as a welder. The person who loved her most was her grandmother, but she died in an accident. Yu Sheng and Zhenya grew up together and were childhood friends. For Zhenya, Yu Sheng gave up the opportunity to immigrate with her family. He worked hard to get rid of poverty. His only goal in life is to be Zhenya's groom. Shi Heng is the son of the chairman of an enterprise. His family is rich, but he has a cold relationship with his father. He went to America to study alone. After his father died, he inherited his father's business management. The intrigue in the shopping mall made him feel exhausted. Yan Xi, a daughter of a family friend, made Shi Heng feel a sense of belonging. He wants to believe that this is love. Zhenya works in a company in Shi Heng. Because she was fired, she went to intercede with her boss, so she happened to know Shi Heng. Zhenya's grandmother's car accident made Shi Heng and Zhenya have more contact and their hearts changed. ...