Since Redstone acquired Giada, the brand's annual sales growth rate has been over 20 percent.

"Giada's elegant and minimalist designs with high-quality materials are embraced by successful career women in China," Zhao says. "It is a low-profile luxury brand and most of our clients are drawn by word of mouth."

About 70 percent of its clients are VIP customers. Usually the average VIP base of many luxury brands is 50 percent, Zhao says.

Wang Lina, a senior executive in the education industry in Chongqing, first saw Giada clothes during a business trip to Hangzhou in 2014 and immediately liked them.

"It is just my style－simple and elegant," she says. "I have bought many dresses for important occasions."