HONG KONG — China’s leaders have long behaved as if nothing could daunt them. But an 800-year-old document written in Latin on sheepskin may have them running scared.

Magna Carta — the Great Charter — is on tour this year, celebrating eight centuries since it was issued in 1215 by King John of England. It is regarded as one of the world’s most important documents because of language guaranteeing individual rights and holding the ruler subject to the law.

One of the few surviving 13th-century copies of the document was to go on display this week from Tuesday through Thursday at a museum at Renmin University of China in Beijing, the British Embassy said last week on its WeChat account. But then the exhibit was abruptly moved to the British ambassador’s residence, with few tickets available to the public and no explanation given. (The document is also set to go on display at the United States Consulate in Guangzhou and at a museum in Shanghai, the embassy said.)