First Step to Reverse, I choose Android, as this is a home task in an interview. You can refer to the Report section and follow it step by step to work through this project. Thanks to the author of Android-InsecureBankv2, dineshshetty!
English version: AndroidReverseEnglishReport.pdf
Chinese version: AndroidReverseReportChinese.pdf
Android-InsecureBankv2-master/InsecureBankv2.apk