If you are wanting an English speaker, then as you have probably become aware, there are a lot more Chinese speakers trying to learn English, than English speakers learning Chinese. So, as the others have said, you will need to be more persistent, and if you are being selective, you may need to be less so.
Another thing is to 'stand out from the crowd'. What makes you more interesting than the hundreds of other potential partners? Westerners often value hobbies and sports highly - I certainly do. I would be much more likely to want to talk to someone who shares my interests. So - put more information in your profile. At the moment, it is not very interesting.