Research on SSL

Overview:
If it is a financial website, you must use EV SSL, which can make the address bar green. Many companies have this certificate. In addition to verisign, WoSign and Jingan have EV SSL. If it is a general e-commerce website, you can use the OV SSL certificate. If it is a personal website, you can use DV SSL. You can also apply for free SSL in WoSign. The generality is the same as the paid SSL. WoSign digital certificate online application WoSign digital certificate :SSL certificate.
Global CA certification service market share division: three giants - Verisign, Thawte, GeoTrust dominate
China's CA security certification system:
non-regional, there are financial CFCA security certification center and China Telecom certification center established by the People's Bank of China and 12 banks (CTCA) and the Customs Certification Center (SCCA), the Guofuan CA Security Certification Center established by the EDI Center of the Ministry of Foreign Trade, etc.
The representatives of regional CAs are two major systems - the "Net Card Pass" certification system headed by Guangdong E-Commerce Certification Center (hereinafter referred to as Guangdong CA) and the UCA Association Card Certification System headed by SHECA (Shanghai CA)

Domestic :
Wotong (Wosign) Free DV Certificate: Free, fast issuance, interface and official information are in Chinese. The problem is that last time CNNIC's secondary CA spoofed Gmail's certificate and caused controversy. Some people in China preventatively block all domestic CA certificates, including Wotong's. They will be blocked and warned when they browse your site.
The specific price:
http://www.wosign.com/price.htm

Abroad:
Sike Iron Gate It is
found that Tencent and Ali use Symantec's certificate, and add that Symantec has acquired versign.
specific price:
http://www.symantec.com/zh/cn/ssl-certificates/#ssproev

GEOTRUST
Tencent mailbox uses GEOTRUST, which I personally recommend.
https://www.geotrust.com/ssl/

DIGI CERT
FACEBOOK, YAHOO, IBM SSL provider digi cert
https://www.digicert.com/ev-ssl-certification.htm

The above can also be found on the following website Buy, have discount, recommend.
https://www.rapidsslonline.com/