[mbed-tls] Chinese characters garbled after calling mbedtls_x509_crt_info() or mbedtls_x509_dn_gets()

Hello everyone, I have this certificate blob and I'm using mbedtls to read this, but after called mbedtls_x509_crt_info() or mbedtls_x509_dn_gets(), the chinese characters got garbled. I have googled this, read the mbedtls knowledge base and searched the issues and got no luck. The field i want to parse is the subject field and the issuer field. and currently I cannot provide the certificate blob due to security reasons.

Any help would be much appreciated.

Sincerely, Newt Ma