A trial has begun in California to decide whether Stanford University can keep the diaries of a top Chinese official, in a case that is being framed as a fight against Chinese government censorship.

The diaries belong to the late Li Rui, a former secretary to Communist China’s founder Mao Zedong.

Following Li’s death in 2019, his widow sued for the documents to be returned to Beijing, claiming they belong to her.

Stanford rejects this. It says Li, who had been a critic of the Chinese government, donated his diaries to the university as he feared they would be destroyed by the Chinese Communist Party.

The diaries, which were written between 1935 and 2018, cover much of the Chinese Communist Party’s (CCP) rule. In those eight tumultuous decades, China emerged from impoverished isolation to become indispensable to the global economy.

“If [the diaries] return to China they will be banned… China does not have a good record in permitting criticism of party leaders,” Mark Litvack, one of Stanford’s lawyers, told the BBC before the trial began.