Experts have questioned the authenticity of newly released photos that appear to show missing tennis star Peng Shuai smiling as she poses for the camera behind a sea of children's toys. Three photographs posted online by a reporter working with CGTN, the international wing of China 's state broadcaster, purportedly show the 35-year-old tennis ace posing with a grey cat while surrounded by a bed of soft toys. Shen Shiwei, the man who shared the pictures to Twitter on Friday, said the images had ben posted on Shuai's WeChat messenger, but experts have continued to express doubts over the veracity…