[{"title":"( 2 个子文件 5.86MB ) 区块链技术 指南 高清彩图版","children":[{"title":"金融业区块链应用研究.pdf <span style='color:#111;'> 782.06KB </span>","children":null,"spread":false},{"title":"《区块链技术指南》超清彩图版PDF.pdf <span style='color:#111;'> 6.62MB </span>","children":null,"spread":false}],"spread":true}]