OEC huanghuali ecological chain,Hainan huanghuali ecological traceability system based on blockchain technology,the project innovatively issued a token-based certificate and transaction voucher for one coin dual-energy token OEC,realizing the gold in the gold and the gold in the coin The perfect integration ensures that even in the cold winter of the currency market,it will never return to zero,with multiple value guarantees of trading,investment,stored value and value added.