Additional documents

Hello, i travel from chennai (india) last friday to Colombo just to apply for the visa (im tourist from chile travelling in Srilanka now and after to china).
I have all the papers you say through this blog to me (passport, form, photo, flight to get in and out of China, bank resume etc) but the dont accept my aplication because they need my flight Out from Srilanka (that i have but not printed in that moment) and Also 18 day hotel reservation in China with itinerary in detail of my trip.
I will travel again on Monday night to Colombo with this New papers (this time from arugam Bay) to do this, so please let me know if i need any extra paper so i dont loose my trip again.
Thanks!