Frank Zhao worked on the EdgeTX/edgetx repository, focusing on improving the graphical user interface for embedded systems using C++. During this period, he addressed a rendering issue in the Pots Bars display, where skipping data entries caused misalignment of visual elements. Frank introduced a dedicated counter to accurately track the column index for available pots, ensuring that bars rendered in their correct positions regardless of skipped entries. This fix enhanced UI stability and maintainability by clarifying the logic behind pot positioning and preventing visual glitches. His work demonstrated a solid understanding of GUI development and embedded systems problem-solving.