BRUSSELS—The European Union (EU) said Tuesday that it wants China to release “verifiable proof” that tennis player Peng Shuai is safe and to conduct a thorough and transparent investigation into her sexual assault allegations. Peng, a three-time Olympian and former top-ranked doubles player, dropped out of public view after accusing a former Communist Party official of sexual assault. ADVERTISEMENT Peng only has had a few direct contacts with officials outside China since she disappeared from public view earlier this month. She told Olympic officials in a November 21 video call from Beijing th…