Companies Reporting Before The Bell• Niu Techs (NASDAQ:NIU) is expected to report earnings for its fourth quarter. • System1 (NYSE:SST) is estimated to report quarterly loss at $0.33 per share on revenue of $93.81 million. • Embraer (NYSE:ERJ) is estimated to report quarterly earnings at $0.53 per share on revenue of $2.00 billion. • Nano Labs (NASDAQ:NA) is estimated to report earnings for its Fiscal Year 2023. • Coda Octopus Group (NASDAQ:CODA) is likely to report quarterly earnings at $0.01 per share on revenue of $3.99 million. • Exagen (NASDAQ:XGN) is likely to report quarterly loss at $0…