{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"In blockchain technology, how can a light client enhance its historical hash query for blocks?","a":"Storing critical block and node information: To improve query efficiency, lightweight clients can  store complete information of some critical blocks and node information. This enables quick retrieval of historical hash values, as the lightweight clients already have the necessary information stored within their system."}]}],"pr":"2283975c52b317eced5e913fff0c3da128b7b734959fbc0dc39e455894627239"}