Can an agent get me a Visa?

Hello,

I am currently working in Qatar and I am wishing to visit China for the Lunar new year (Chinese new year) I can not get to the consulate with the required documents during their opening hours (Sunday, Tuesday, Thursday 0900 - 1200) due to work commitments outside of Doha.

Is it possible to task a travel agent or such to get the said Visa on my behalf? or does one have to attend personally?

I am a UK national.

Thanks in advance.