[Policy] 1. The SEC in Nigeria has issued regulatory guidelines for digital currencies and crypto-based companies or startups. [Cryptocurrency] 1. Tether will coordinate with a 3rd party to perform two chain swaps (conversion from Tron to ERC20 protocol) for 1 billion USDT on September 15; 2. NEM will be updated on a large scale in December, and a new chain "Symbol (XYM)" will be born; 3. Ethereum 2.0 coordinator Danny Ryan has announced a testnet called “Spadina,” which will run in parallel to Medalla during its three-day lifespan; 4. The proposal of SushiSwap establishing a minimum voting threshold was passed, meaning that the $14 million worth of SUSHI buyback will happen on Sept 15. [Others] 1. Vitalik Buterin defends the Nakamoto Consensus, saying it is not as subjective as other criticised; 2. Sushiswap multisig Adam Cochran will sell his holdings in 72 hours and resign on December 15; 3. The legal person of Bitmain was changed once again from ZHAN Ketuan (Micree Zhan) to WU Jihan.