Step 1: Understand the context of the question.
The question is asking about the specifications of a foreign exchange futures contract in China, specifically the quantity of dollars represented by one contract.

Step 2: Recall the standard specifications for forex futures contracts.
In financial markets, the specifications for futures contracts, including those for currencies, are typically standardized by the exchange on which they are traded.

Step 3: Identify the specific contract size for USD futures in China.
In China, the Shanghai International Energy Exchange (INE) and other relevant exchanges list various futures contracts、However, for USD futures, we are likely referring to the China Financial Futures Exchange (CFFEX) or another relevant exchange that lists currency futures.

Step 4: Provide the contract size for USD futures.
For the Chinese financial futures market, specifically the China Financial Futures Exchange (CFFEX), one hand (or contract) of USD/CNY futures represents $1,000,000.

The best answer is C、$1,000,000.