"Premier League club Arsenal is helping a Chinese investigation, after it was potentially caught up in a fraud around its sponsorship deal with carmaker BYD"

BBC:

The Arsenal-BYD partnership was announced to great fanfare in April this year, with the club saying it had reached a deal with "the world's best-selling electric vehicle manufacturer".

As part of the deal BYD would receive pitch-side LED signage and branding on dugout seats at the Emirates Stadium.

...

The individual at the centre of the allegations has never has been an employee, nor been given authorisation to conduct business in its name, Shenzhen-based BYD said in a statement to the Hong Kong stock exchange.