【正文】
c) Digital Credit Card Payment Systems d) Digital Checking Payment Systems Step Three: Understand the Digital Wallet System through a case study of BOC Electronic Wallet a) Point out key words in the definition for the students: b) Explain those key words in the following table: c) Further explore the definition through a demonstration of case study: d) A case study parison work to demonstrate two major types of Digital Wallet:Step Four: Understand the Di