Hello Jiyu,
I think your post is very clear, organized, and easy for me to read and understand. The principles of universal design you listed and explained make me have a better understanding of this concept. Also, you insert an images about the principles in order to help audience to better understand what each principle is and what the examples it includes directly. The example you shared about universal design grab my attention as well because it plays a very valuable and meaning role in this COVID-19 pandemic.