Liu Qiangdong and Zhang Zetian pose for a photo while having a meal together, New York, United States, April 15, 2014. [Photo/China Youth.com]

Zhang Zetian, born in 1993, become popular after a photo showing her holding a cup of milk tea went viral online in 2009.

She has been known as the "Milk Tea Sister" since.

Liu Qiangdong confirmed their relationship in April last year via his mircoblog as new photos emerged online showing the couple holding hands and hugging in New York City.

The couple was reportedly met in New York-based Columbia University.

Zhang, a junior student at Tsinghua University and an exchange student at Columbia University, has just finished her internship with Microsoft Research Technology Center.