30 years have passed since Tiananmen Massacre that occurred just after the beginning of Heisei period. There is no freedom in China to see these historical videos by means of government censorship. China's surveillance society seems to have not changed for 30 years, with cars, smartphones, drones, etc. being flooded and economically developing in the cities of skyscrapers growing.☞https://plaza.rakuten.co.jp/qualityoflife/diary/201906050000/