I had ever heard about a common shortness of a Chinese software is lack of error handling in a user interface program. Chinese developers tend to assume that users always input the valid information. And other problem of Chinese developer is that failure to design the system. We are used to do some work under detail level specifications, but often fail to define a problem, and solve it properly. I also encountered these two problems in my developing process of a web interface in one of my course. First of all, I threw myself into the coding process totally, nearly as soon as I accepted the task. It means I didn't consider the usability issues at all. No doubt, my page was hard to understand as well as the error handling functions were absent. And then, in the test phase, more problems emerged. I didn't check the return value of a remote API call, which cause the warning message was pushed into the web page when the APIs of PlanetLab (a test internet structure of this project) can't provide the right return value. It is still a problem of error handling. I promise I will try my best to improve my programming in  the aspect. Some code and analysis will be coming soon...