Why are the words "Revitalizing the Countryside" written on the bank card?

Because it is a rural revitalization card.

Rural revitalization card is a theme bank card launched by China UnionPay and China Agricultural Bank to provide financial services for agriculture, countryside and farmers.

The basic function of this card is similar to the ordinary debit card of Agricultural Bank of China. It has financial service functions such as deposit and withdrawal of funds, transfer, consumption and wealth management. You can also handle credit business and online banking business, and bind China UnionPay Express Account for consumption.