Critique request: three 筹备 sentences: 有的人的筹备很不合理 and 北京花了很长时间做筹备工作 and 不需要筹备任何配料
All of your sentences sound weird.

Barring other grammatical errors, 筹备 is used to describe “collate resources to prepare for an event”. 


  日本政府已经花了好几年的时间来筹备今年的东京奥运会。


The Japanese Government has spent a few years preparing for the Tokyo Olympics this year.

Your first and third sentences don’t sound right because they don’t refer to an “event” per se, and you should state clearly that the Beijing government was preparing for the New Year celebrations in the second sentence.