Colombian citizen in Germany and/or Denmark current student - exchange for 2 months in Beijing

Hi, Dear Mrs/Mr I am Colombian citizen living and studying Master Degree in Denmark with Danish residence permit also have residence permit in Germany as we have to share in the two countries and Universities, I need to go to Beijing and stay there for 2 months in September 2013, also for studies purpose.
1.Do I need visa application ?
2.If yes, Can I do it online ?
3.if it is not possible online, what embassy or consulate should I go?
4.How long does it the process of it?

Thanks.