The black cat complaint platform is a consumer service platform operated by Sina. Users can complain about the irregular behavior of merchants through the platform, including complaints about the credit card center of Shanghai Pudong Development Bank. The complaint platform will have special staff to handle complaints, investigate complaints and take corresponding actions. It can help users express their dissatisfaction and urge the credit card center of Shanghai Pudong Development Bank to improve the service quality. The existence of complaint platform can improve the chances of consumers' voices being heard and play a supervisory role in enterprises.