Joe Biden’s son, Hunter Biden, announced he’d be stepping down from the board of his Chinese-backed firm and vowed he wouldn’t engage in any business overseas if his father wins the presidency in 2020, even as he denied any wrongdoing.

Hunter Biden said that by the end of October he’d be resigning from his position on the board of BHR (Shanghai) Equity Investment Fund Management Company, a private equity firm established in 2013 with backing from Chinese state-owned financial companies with the goal of investing Chinese money and whose largest shareholder is the state-controlled Bank of China. The announcement on Sunday came through his lawyer, George Mesires, as first reported by Bloomberg.