Honestly, I'm somewhat shocked by this place's mediocre Yelp score. Taken for what it is, namely, a nameless Chinese place on the PATH, Modern Wok is awesome. It's pretty much the only Asian non-chain offering even remotely close to the Financial District, and it's far cheaper than its generic competitors. The food is hot, authentic, and served with characteristic indifference.
The line will be long, but it moves surprisingly fast - expedited no doubt, by their only cash policy and impatient glares should you take longer than ten seconds to order.
A great place for a cheap and cheerful lunch option.