Read public notice for purpose, detail, and action. Then compare each answer with exact evidence from the text.
为了让更多人参加周末的中文读书会，社区图书馆决定调整本周六的活动时间。活动原来安排在上午九点，现在改到下午两点，地点仍然是二楼活动室。
已经报名的读者不需要再次报名。如果新的时间不方便，请在周五下午五点以前给图书馆打电话。工作人员会把您的名字保留到下个月的读书会。
参加活动时，请带一本最近读过的中文书，并准备两分钟的简单介绍。图书馆会提供水和笔记纸。
Underline what changed, what stayed the same, and what the reader must do.
Answer before opening the explanation. The evidence tells you which relationship in the text controls the answer.
原来安排在上午九点，现在改到下午两点 states the main change; the location remains the same.
已经报名的读者不需要再次报名. Calling is only for readers who cannot use the new time.
The final paragraph asks for 一本最近读过的中文书 and a two-minute introduction.