大概率是真有其事的传闻，但是否官宣我这边还无法确认（我的信息截止到 2024-10）。需要的话我可以帮你查最新消息并给出

Analyzing the U23 Rule Change

I'm considering the recent U23 rule change in 2023. I can ask the user if they’d like a quick background and tactical analysis or if they prefer me to verify the report. I plan to share a short confirmation that it's a rumor, based on my knowledge cutoff, along with basic context and what to expect tactically. I’ll keep it friendly and concise while ensuring there's no misinformation since it's a harmless sports rumor.

I can provide key details about Nick Montgomery's status and relevance for Beijing Guoan as well.