The former publisher of pro-democracy newspaper Apple Daily has denied being asked to testify against his former employer Jimmy Lai by police, as the high-profile national security trial against the media mogul continued. Cheung Kim-hung returned to the witness stand for his 11th day of testimony on Thursday afternoon. Cheung, who has pleaded guilty to conspiring to collude with foreign forces, is now acting as a witness for the prosecution. The ex-publisher, who was a senior executive at Apple Daily before it was forced to close in June 2021, was arrested that month and has been in custody si…