The Chinese national flag is seen in Beijing, China April 29, 2020. REUTERS/Thomas Peter/File Photo HONG KONG, Aug 9 (Reuters) - China will require all mobile app providers in the country to file business details with the government, its information ministry said, marking Beijing's latest effort to keep the industry on a tight leash. The Ministry of Industry and Information Technology (MIIT) said late on Tuesday that apps without proper filings will be punished after the grace period that will end in March next year, a move that experts say would potentially restrict the number of apps and hit small...