Abstract: A power conversion system and an auxiliary power supplying method thereof are provided. The power conversion system includes AC and DC ports, an AC-DC converter, a bus capacitor, and a first auxiliary source. The AC port receives or provides an AC voltage, and the DC port provides or receives a DC voltage. The AC-DC converter has an AC terminal and a DC terminal electrically connected to the AC port and the DC port respectively. The bus capacitor is electrically connected to the DC terminal. The first auxiliary source has an input terminal electrically connected to the bus capacitor for receiving a capacitor voltage across the bus capacitor.

Abstract: A data processing method, a data processing apparatus and a computer-readable non-transitory storage medium, the method including receiving, from an authenticating user, an authentication request for a historical transaction and transaction information of the historical transaction; generating authentication information of the historical transaction according to the transaction information of the historical transaction; acquiring storage information of the historical transaction from a block chain; comparing the authentication information of the historical transaction with the storage information of the historical transaction, and determining whether the transaction information of the historical transaction is authentic according to the result of comparison.