Participation Page: https://ak.hypergryph.com/nissin/index / (Never mentioned that it was CN exclusive but I believe it will be CN exclusive since it was not posted in GL/JP official sites...at least not yet *if ever).
Promotional Video: https://www.bilibili.com/video/av97131408
Weibo Post: https://m.weibo.cn/status/4484514430682697?
Event mechanics are posted in the participation page (1st link), winners will receive a cup of Arknights x Nissin Noodles, a single player can participate up to five times (once a day).
Aegle presently has 9,941,205 views for Arknights across 377 videos, accounting for over 1 day of watchable video on his channel. This is 73.60% of the total watchable video for Arknights on Aegle's YouTube channel.