Formal.

1. Regulatory compliance: Yikao operates under the supervision of China UnionPay and the People's Bank of China, and abides by relevant payment industry laws and regulations. This means meeting the requirements of national regulatory agencies and having legal payment licenses and qualifications.

2. Multiple payment services: Yikaon provides a variety of payment services and technologies, including UnionPay card payment, international credit card payment, Alipay payment, WeChat payment, etc. This allows consumers and merchants to choose payment methods that suit their needs and enjoy a convenient and secure payment experience.

3. Certifications and licenses: Yikaon has obtained multiple certifications and licenses in the payment field at home and abroad, such as the People's Bank of China payment license, UnionPay electronic payment license, international credit card organization license, Alipay payment license, WeChat Pay license etc. These certifications and licenses prove Yikaon’s legal status and credibility in the payment industry.