Does the questioner want to ask "What does the Chongqing Express Office authorized mortgage invalidation mean"? Real estate mortgage cannot be granted on the Yukuaiban platform. Yukuaiban is a mobile government service platform officially launched in Chongqing on November 21, 2018. Authorizing a mortgage means granting the right to mortgage loans for houses and properties. Failure to do so means losing the original validity. With Yu Kuaiban, you only need to register once to achieve "one login, complete process". The "Internet + Government Services" command center located in the Municipal Government Office will conduct online tracking of each approval service item throughout the process. Supervision to ensure convenient and fast services for the masses.