https://www.reuters.com/article/us-china-companies-cyber/after-didi-china-launches-cybersecurity-probe-into-more-u-s-listed-firms-idUSKCN2EB04O >BEIJING (Reuters) -China's cyberspace watchdog said on Monday it is investigating online recruiter Zhipin.com, and truck-hailing apps Huochebang and Yunmanman, ramping up a crackdown on the mainland's tech companies amid tightened regulations on data security.