Baidu Antivirus looks pretty, but it just doesn't do the job. The independent labs don't love its protection abilities, and in my testing I couldn't see the anti-phishing component working at all. It scored super-low in my local malware blocking test. The best thing I can say is that it's score in my malicious URL blocking test was precisely average.
If your budget requires free antivirus, just about any other product would be a better choice. You can try as many as you want, of course, but our Editors' Choice for free antivirus remains AVG AntiVirus FREE 2014.