Bing found the following results
Names of Beijing - Wikipedia
Beijing’s Name Change: How and When Did it Happen?
What is the difference between Peking and Beijing?
How Peking Is Different From Beijing - University of California, …
When was the name changed from Peking to Beijing?
Beijing or Peking? - The Economist
How Did Beijing Get Its Name? - Culture Trip
Beijing - Wikipedia
Tidbits: Peking or Beijing? - Medium