Domestic screens have achieved a key technological breakthrough, with Xiaomi and a team from Tsinghua University working together to achieve mass production of the fourth generation OLED display technology (pTSF), which is China's first underlying display technology solution. Starting from the molecular design stage of luminescent materials, we have been involved in achieving a complete closed-loop system from the material end to the terminal. The REDMI K100 Pro series was launched globally, and China's screen industry has achieved a leap from "following" to "leading".