Randy Garutti, CEO of Shake Shack. [Photo provided to chinadaily.com.cn]

"In terms of site selection, whether it's the Xintiandi commercial zone in Shanghai, or Sanlitun in Beijing, Shake Shack opened stores at places where high-end consumption groups gather. To cater to local consumers' eating habits, it has made slight adjustments to its foods and beverages. The combination of American cuisine and local features is a major attraction for consumers," Huang said.

He added that Shake Shack pays attention to enhancing user experience. "Made-to-order food requires a certain waiting time. To ease consumers' anxiety when they are standing in line, it offers free desserts to consumers. People can also check their order status on the restaurant's online platform."

Despite the great success Shake Shack has so far enjoyed in China, Garutti said the company does not plan to expand its presence in the country too rapidly.

"We do one burger and one Shake Shack at a time. We build the store, and we work hard to make it a great gathering place. We don't just keep building and building without thinking about it," he said.

Speaking of China's business environment, Garutti said that the company appreciates the warm and hospitable business climate the country has offered.

"Our local partners helped us find locations, hire great people, enabling us to really grow a business locally. The government is cooperative, and we have established an incredible partnership," he said.

China has been stepping up efforts to encourage foreign investment and optimizing its business environment in recent years. Specifically, it has been cutting its negative list, relaxing restrictions on market access, clarifying market regulations and improving services.

China's actual use of foreign direct investment surged 31.5 percent year-on-year to 176.76 billion yuan ($26.07 billion) in the first two months of this year, said the Ministry of Commerce.

"Our restaurants in China are the busiest ones for Shake Shack. We are confident about the market, which is the most resilient during the pandemic," Garutti said.

"We remain humbled by our fans in China and continue to be encouraged by the performance of our Chinese business through this recovery. It's a great time to deepen our roots in this market," said Michael Kark, chief global licensing officer of Shake Shack.