Rose Yip Woo, her husband, Shu Tai Woo, and their children Robert Kuotao, age 3 ½; and Ruth Kuochen Woo, age 1 ½ years, arrived in Seattle on 20 June 1927 on the S.S. President Madison. Rose was born on 27 May 1892 in Philadelphia, Pennsylvania. The Woo family was scheduled to stay one year but they applied to stay another year and their application was approved. Rose and the children had traveler’s exemptions and her husband had a student exemption from the Peking Union Medical College in Peking, China. Dr. Woo had a fellowship with the Rockefeller Foundation. They were residing in New York City.
Rose Yip Woo’s visit was approved and extended to 20 July 1928. More information about the length of stay for her husband, Dr. Shu Tai Woo would be found in his file. 
Hundreds and hundreds of students entered the U.S. on Rockefeller Foundation grants.

Additional information:
The story of the Rockefeller Foundation by Raymond B. Fosdick or see an abstract his his book

According to the Rockefeller Foundation website, https://www.rockefellerfoundation.org/about-us/our-history/:
The Rockefeller Foundation was incorporated in 1913 “to promote the well-being of mankind throughout the world.” The China Medical Board established a medical school in Shanghai in 1916 and one in Peking in 1917. 

Update 28 December 2024.