South Korean teen golfer Choi Hye-jin signed a lucrative endorsement deal Monday, just days after turning professional.

Choi, runner-up at the US Women's Open last month, signed a two-year deal with Lotte Group. While exact financial terms of the deal were not disclosed, Choi reportedly signed for the biggest contract ever handed to a rookie by a Korean conglomerate.

One Lotte official said Choi will receive about 600 million won ($535,800) per year. The official said there were other companies who offered Choi more money, but Lotte first took interest in Choi three years ago.

Choi is also expected to receive performance-based incentives, depending on her positions in the world rankings and money list, and her showing at major championships.