{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to building a trust system in e-commerce?","a":"(Please  provide the third aspect of the application of blockchain technology in e-commerce trust system construction.)"}]}],"pr":"cd9faf20ca459766d1a3e8990807b6d077db56bd928b1b2c06ae20378be69409"}