Option 1.

You may fly to my city and come to our office,
Then, pay us by face to face.

Under this way, the disadvantages are
As a hurry time,There is a possibility which can't have a good arrangement for you  in advance
in Chongqing,China.

What's more, if your visitting date is during China holidays or weekends,Maybe you may spend more cost for booking suitable hotel, restaurant and other tickets.
What is the most important,Maybe you may not get visitting sceneries spots tickets even in line.

Thirdly,as you have not paid any services charge to us, When to get plane off in Chongqing,
We may pick you up there after you send your serious plane ticket copy to us in advance.
but we will not arrange special driver for it, only taking city metro or take taxi
(taxi fare paid by yourself),and we may come to pick you up only in the day in airport
as you have not paid any charge,

Option 2.

Prepaying 30% of estimated total amount  as our arrangement in advance
like paying hotel downpayment etc.

Procedures: signing simple agreement in advance
                     Sending your offical plane ticket copy or passport copy to us in advance