International clients can’t view site

Hello, I created my online teaching company’s website with www.remarpro.com, but I have some clients in China who are unable to access the website. It seems that my website is blocked in China, which is a big problem for me, since many of my clients are in China. I hope someone can give me clarity on the reason for this and can help me resolve this problem as soon as possible. Thanks in advance for the help! I truly appreciate it. Kind regards, Juliana.