Which should go first?

Hi,

I would like to ask which should go first, booking of your flight ticket or applying for the chinese visa?

And as a follow up question, regarding information of finances is it really required to provide bank certificate of deposit balance of at least 100 thousand in pesos? What if you do not have that kind of balance? But you have enough and sufficient money to travel for an L TYPE for more or less 13 days in shenzhen.

Thanks,