{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the key steps in upgrading a blockchain?","a":"Scalability Optimization: As the application scenarios of blockchain continue to expand, scalability issues become increasingly prominent. To address  this problem, developers need to upgrade the blockchain, such as introducing smart contracts, sidechains, and other technologies."}]}],"pr":"9e1ed7f85c6f09682fb1e6346eda9d793544f49a6f3af88f07edfb8b9b2778b9"}