Chinese rideshare president Didi Chuxing and her father, the founder of Lenovo, have ended their public presence on China’s leading social networking site, the newest Chinese tech leaders to come out of the spotlight. Jean Liu de Didi and his father, Liu Chuanzhi, enabled a feature on the Chinese platform Weibo to hide all old messages, sometime on the Labor Day holiday that had just ended. None had published in the past six months. Elder Liu, who has 880,000 followers, and his daughter, who has 10 million, gave no explanation as to why to go private, but Weibo users found...