A court in Beijing has declared a Bitcoin mining contract to be invalid, following an intensification of efforts by regulators to scourge cryptocurrency activity from the Chinese economy. On 15 December the Beijing Chaoyang District Court dismissed a lawsuit from a plaintiff demanding the payment of income derived from Bitcoin mining, marking the first time that a Beijing court has declared a cryptocurrency mining contract to be invalid. In May 2019 Fengfu Jiuxin Company (??????) signed several contracts to entrust Zhongyan Zhichuang Company (??????) with Bitcoin mining services as well as the payment of related profits, in exchange for a…