Washington (CNN)Former national security adviser John Bolton has leveled a stunning accusation against his former boss, claiming in his new book that President Donald Trump personally asked his Chinese counterpart, Xi Jinping, to help him win the 2020 US presidential election, according to a copy obtained by CNN Wednesday. Bolton also charged that when Xi told Trump during a meeting at last year’s G-20 summit that China was building concentration camps for the mass detention of Uyghur Muslims, Trump said Xi should go ahead building the camps, “which he thought was exactly the right thing to do.”At another meeting during the G-20 Summit in Osaka, Bolton writes Trump “stunningly” turned the conversation to the upcoming 2020 election. The former national security adviser said Trump “stressed the importance of farmers and increased Chinese purchases of soybeans and wheat in the electoral outcome,” adding that he “would print Trump’s exact words, but the government’s prepublication review process has decided otherwise.”