Luckin Coffee is huge in China. Now it's entering the U.S. with a model that Starbucks is sunsetting: perfunctory, mobile-first efficiency.

Starbucks may soon face stiff competition on its home turf as Chinese coffee chain Luckin Coffee expands into the United ...

Luckin Coffee, the fast-growing chain that beat Starbucks at its own game in China, is entering the United States.

Starbucks CEO Brian Niccol talks with NBC News' Hallie Jackson about how the coffee company is planning to keep ...