school allows her to have time to carry out her own projects. Now, Yeo is leading PixelHacks, a 24-hour hackathon (编程马拉松) for female high school students.

　　Yeo had never seen a men's bathroom line five times longer than the women's bathroom line until she attended the Apple Worldwide Developers Conference (AWDC) in 2016. In other public places like airports, theaters and restaurants, it was always the opposite. The great gender ratio (性别比例) difference opened her eyes. "Most computer science classes and robotics teams only had a few girls and the hackathons I attended were occupied by team students," says Yeo. Out of every 200 hackathon attendees, only an average of 15 percent were female. Yeo had helped local girls with code clubs and organized free coding (编程) workshops at a public library for middle school students.But AWDC made her realize that wasn't enough. She took action to introduce many girls in her community to the fun, creative side of technology. Eight months later, she stood in front of over 70 young women who were eager to learn to create applications.

　　For two years, Yeo organized PixelHacks, Northern California's first all-female high school hackathon where attendees work together to create a technology project in a limited amount of time. Yeo founded it to expose girls to technology and help them build confidence and acquire fundamental skills. She invited female industry experts to teach all attendees and speak about their experiences. Yeo marketed the event to high schools across the San Francisco Bay Area, especially low-income schools. Right after PixelHacks I, Yeo saw many familiar faces from PixelHacks I at other local hackathons and tech events.A mother of a PixelHacks Ⅱ attendee said she had hoped her daughter could meet new friends and develop an interest in computer science at Yeo's hackathon.After the event, she was shocked to hear that her daughter decided to make a career in programming.

Being able to observe the influence of her work on so many girls and seeing their interest in computing and technology grow is Yeo's proudest achievement, Yeo strongly believes that all women are equally talented in technological abilities. The problem of the great gender inequality lies in the lack of exposure to programming and engineering for many young women. Having access to opportunities to learn