"Draw bitcoin as an innovation consisting of three elements: the block chain, proof of work, and the difficulty adjustment."

#m=image%2Fjpeg&dim=1024x1024&blurhash=UBDmUJLN4%3B%24f_4ElJB-P00R5cEXnEg%23l%2B%5BE%2C&x=747cfc548b67bfa45b55ab920f3c666f492fddf478b0fe84231606c0bef4cec5