The exchange rate between RMB and USD break 6.6 from yesterday. Up to now it is 6.5695.
This means before you can spend USD100 to buy goods that worth RMB660 from China and now it can only buy goods worth RMB656 which is smaller.

The rate keep dropping since last week. If any supplier in China provide you quotation in USD then these days better to require price update before final confirmation on the order.

The rate in the past 10 days:

2017.8.30 – 657.1

2017.8.29 – 659.85

2017.8.28 – 662.89

2017.8.25 – 664.99

2017.8.24 – 664.59

2017.8.23 – 665.24

2017.8.22 – 664.54

2017.8.21 – 665.74