Hard Numbers: Shanghai lockdown, US billionaire tax, Amazonian NFTs, Houthi truce

2,631: Shanghai will go into lockdown after reporting a record 2,631 new asymptomatic COVID infections on Sunday. China’s largest city had been trying to avoid this extreme measure, but authorities ultimately caved to Xi Jinping’s zero-COVID policy.

100 million: On Monday, the Biden administration will propose a 20% minimum income tax on US households worth at least $100 million in order to cut the deficit. This includes taxing unrealized capital gains, which Democrats failed to pass in Congress last year.

150: A Brazilian company that owns some 150 square miles of the Amazon is funding conservation efforts by auctioning off sponsorship of rainforest lots as non-fungible tokens. NFT holders will not own the land itself but rather get access to information about how it is being preserved.

7: On Saturday, Houthi rebels declared a three-day truce with the Saudi-led coalition to mark the seventh anniversary of Yemen’s civil war. The olive branch came a day after the Houthis attacked a Saudi oil plant near the Formula One race track in Jeddah, to which Riyadh responded with airstrikes on rebel-held cities in Yemen.