Authorized Travel Agency

Hi, my friends and I will visit China for the first time in November. I read from a travel blogger that the Chinese Embassy imposed new rules recently (including a higher minimum average daily balance for the bank statement). But if the following is still applicable, then we might be able to push through with our 4-day trip:
"BTW, if applicants have invitation letter from an Authorized Travel Agency, both income tax return form and bank statement are not required."
Could you recommend authorized travel agencies?