Rob Gifford's China Road is a must-read for anyone -- investor or otherwise -- who is looking to increase his understanding of our world's emerging economic superpower. And while myriad investment ideas dot the book, the most significant can be divined from this passage:

So much in China now depends on oil. Its importance resonates silently down through every stratum of society. The Communist Party must keep the economy growing; otherwise the unemployed and underemployed could cause social unrest. To keep the economy growing, the Party must build new factories and create new jobs. (Some economists have calculated that 24 million new jobs must be created every year in order to do this.) To fuel the factories and the construction, China must have more oil. And to achieve that goal it is searching for oil within its own borders and going out into the world, making deals in Africa, and Central Asia, and Southeast Asia.

And when Mr. Gifford asks a former oil worker if China has enough oil, the worker responds cryptically, "Not yet."

Some startling statistics
The fact is, China needs -- and is going to need -- a lot of oil. (And that's before we account for the Sichuan Tengzhong Heavy Industrial Machinery Co.'s recent purchase of Hummer.) Indeed, according to BP's Statistical Review of World Energy 2009, though global oil consumption was down 0.6% in 2008, oil consumption in China increased 3.3% to nearly 8 million barrels per day.

And while that already accounts for nearly 10% of global oil consumption, China looks like it has a long way to go. That's because while it has four times the population of the United States, it today consumes less than half the amount of oil. Should China someday consume the same amount of oil per capita as the United States, we are going to see skyrocketing prices and a significant global supply squeeze.

Unlike the United States, China has anticipated this
This is why China is engaged in an aggressive global grab for natural resources. These efforts include greatly increased investment in resource-rich Latin America, including a massive $10 billion investment in Petrobras (NYSE:PBR) to aid that Brazilian state-owned company's exploration activities, as well as a joint venture between PetroChina (NYSE:PTR) and Hugo Chavez's PDVSA (yes, China is that desperate). It also includes significant asset acquisitions in Africa, such as CNOOC's (NYSE:CEO) 2006 investments in Nigeria and expected purchase this year of assets offshore Ghana. Finally, we even have plans by Beijing-based Sinopec (NYSE:SNP) to commence drilling in previously disputed waters off Vietnam, as well as that company's major announcement just this week that it will acquire Addax, a major producer in Africa and the Middle East, for more than $7 billion.

It's worth noting here that PetroChina, CNOOC, and Sinopec are all state-owned companies in China, which means the open markets may never see the fruits of their investment. And while we here in the United States were threatening to tax the likes of ExxonMobil (NYSE:XOM), ConocoPhillips (NYSE:COP), and Chevron (NYSE:CVX) to high heaven while energy prices were high, the Chinese government was putting its energy companies in a position to help secure the country's economic future.

What this means for investors
There are two obvious takeaways here. The first is that if you're willing to stomach some volatility, going long on oil and related energy companies for the long term at current prices is probably a pretty good play. (That's particularly true if you believe alternative energy technologies will be slow to commercialize.)

The second is that if any emerging market will suffer from a lack of energy supplies, it won't be China. When you add to that fact China's infrastructure advantages over other emerging markets, its relatively strong balance sheet, immense human resources, and growing reputation as a financial center, you get what looks to be the world's most promising emerging market.

That is a bold, but reasonable claim
That potential is one of the reasons our Motley Fool Global Gains team is heading back to China in July to meet with some particularly promising small companies. If you're interested in hearing what we find, you can sign up to receive all of our free real-time reports from the field simply by providing your email address in the box below.

But even if you don't check back with us next week, I think if you check back in 20 years, you'll find that a "long energy, long China" investment strategy will have worked out quite well.

Tim Hanson is co-advisor of Motley Fool Global Gains, and while he's looking forward to the trip, he's not looking forward to 16 hours on a plane. He does not own shares of any company mentioned. Petroleo Brasileiro is a Motley Fool Income Investor selection. CNOOC is a Motley Fool Global Gainsrecommendation. The Fool's disclosure policy laughs in the face of jetlag.