China Social Media Reciprocity Act This bill authorizes the President to impose sanctions by requiring social media companies to block certain individuals and entities from using the company's social media services. The bill also requires the President to impose such sanctions on certain individuals and entities, including those that a social media company knows or should have known are (1) on the Office of Foreign Asset Control's list of specially designated nationals and blocked persons, (2) senior officials in China's government, or (3) agents or instrumentalities of the Chinese Communist Party (CCP) or China's government. The President may waive such sanctions if the President certifies to Congress that the CCP and China's government have removed all prohibitions on U.S. government officials participating in social media platforms in China.