Sweetie Salad's tuna and okra salad. [Photo provided to chinadaily.com.cn]

However, Wu is very clear about the power of marketing, and why it should not be overused.

"The fast-spreading nature of Internet marketing is a double-edged sword. If you do well, people will spread the message for you for free," she explained. "However, as long as your product or service has a flaw, you will receive much more harm than you expected."

According to Wu, the brand has been very careful with ingredients' sourcing.

"We only use vegetables, fruit and meats whose origins can be traced," she said. "And all of our dairy products and olive oil are imported."

At the same time, the two founders also understand that salad it not a mainstream food for Chinese, so they have also made changes to tailor it for Chinese palates.