Gao Ying's preferred method for pulling the bow string is to use a double-hook thumb draw --- with a special technical wrinkle.
Please check out this tutorial to learn more about this unique draw hand variation.
Gao Ying (高穎) was an archery teacher and author from the Ming Dynasty (1368--1644 AD), and you can get more info about the translation of his works at http://www.thewayofarchery.com.