Qian Zhiya may be Starbucks' worst nightmare.

The 42-year-old Chinese entrepreneur says she is betting that her fledgling Luckin Coffee brand will eventually have more cafes in China than Starbucks, and she has Singapore's sovereign wealth fund and other investors bankrolling her plan.

Luckin, which only officially launched in January, has opened more than 660 outlets in 13 Chinese cities thanks to a supercharged growth plan based on cheap delivery, online ordering, big discounts and premium pay for its staff.