India, Jan. 28 -- A Meta AI researcher has decided to move base to London after he was denied reentry to the United States - the country where he has spent the last seven years. Zifan Wang said in a social media post that the US refused to let him reenter after he visited his family in China.

Wang had been living and working legally in the US on an O-1 visa, which is reserved for people of "extraordinary ability".

Despite holding an O-1 visa - often dubbed the 'genius visa' - and having stellar professional credentials, including a PhD from Carnegie Mellon University, Wang was not allowed to reenter the US.

He vented his frustration in a social media post, announcing that he would be moving from the US to the UK.

"I am moving from SF ...