Wu Ming-yi’s “The Stolen Bicycle” was among the 13 books longlisted for the prestigious award.
The author said his nationality on the Man Booker website had been changed from “Taiwan” to “Taiwan, China” since the list was announced.
The incident follows Beijing’s rebuke of foreign firms, including Zara, Marriott, and Delta, for listing Taiwan as a separate country on their websites.
Taiwan has been self-ruled since the end of a 1949 civil war, but China continues to claim sovereignty over the island.
Beijing has increased pressure on Taiwan’s President Tsai Ing-wen as she has continued to refuse to acknowledge the island is part of “one China.”
Wu said on his Facebook page he cannot agree Taiwan is part of China.
“My nationality on the web page has been changed from Taiwan to Taiwan, China, which is not my personal position on this issue,” he said.
“I will therefore seek assistance in expressing my personal position to the awards organisation,” he wrote.
The Man Booker organisers said they were advised “Taiwan, China” was the “correct, politically neutral form.”
They added they were seeking clarification from the UK’s Foreign and Commonwealth Office.
“We are aware that Wu Ming-yi defines himself as Taiwanese and have kept him informed throughout the process,” they said in a statement Friday.
Wu’s book, written in Chinese and translated into English, is about a novelist searching for his missing father’s bicycle.
The shortlist for the prize will be announced on April 12, while the winner will be announced on May 22.