Was doing research for a completely unrelated to anything cyberpunk project and came across this article from 2014.
https://www.dailymail.co.uk/news/article-2540955/Beijing-clouded-smog-way-sunrise-watch-giant-commercial-screens-Tiananmen-Square.html
TLDR - Smog was so bad in China, they got giant screens to play the sunrise in the morning.
STREET SAM