As far as I know there shouldn't be any tax implications of bringing your money back into the US. You've already "paid tax" on that money, even if, with the foreign tax exemption, that tax ended up be $0.
As far as logistics, just avoid bringing in a suitcase full of cash (>=$10,000) or gold coins. I've wired money from my own bank account China to the USA in the past. No problems/complications on the US end. (Chinese regulations are a pain, but I'm assuming you're coming from a different country.)