ChainCatcher message, f2pool data shows that, based on an electricity cost of $0.06 per kWh, the mining machines such as Shennma M30S++ (shutdown coin price $57,513), Shennma M33S++ (shutdown coin price $57,514), Avalon A1346 (shutdown coin price $55,657), and Antminer S19 Pro (shutdown coin price $54,813) are all approaching their shutdown coin prices.