Whatever happens in other sectors, China wants to keep selling low-cost consumer goods to the vast U.S. market, which has gobbled them up for years. China knows that other developing countries such as the Philippines or Vietnam could start churning out some of these toys, socks and light bulbs in their own factories. They don’t want U.S. buyers finding new sources for these items.

So as usual in most trade disputes, both sides need each other. The real danger that we face is generous promises from China that might never live up to expectations. Chinese leaders want their country to become the world’s pre-eminent power, and they know they will need all the money they can corral to achieve that ambitious goal. Perhaps they can finesse this by buying more U.S. products while reducing other imports. Our gain would be someone else’s loss, like Brazilian soybean farmers.

So we’ll all see how this plays out, for American Ethane and plenty of other U.S. companies. The payoff could be massive here … if the political barriers can be cleared.

Look for Thomas Taschinger’s business column every Thursday.