"Work as if you live in the early days of a better nation"
Also, the picture of the enterprises in the Components section does not show their cost - is it on the reverse side?
It's there, but small. The price is either a "1" (ships and opium) or "0" (merchants).
5.2 I take it that the enterprise that you place comes from your holdings? May be worth clarifying.
Also, it doesn't say how you set the price which only becomes clear later, in the rule referring to scions.
You are right about this, though the example of play and the chart on the board makes it clear.
5.3.8 If Lin Zexu can't be placed in a region with two black counters, must he placed in a region with one black counter if possible? I presume yes but worth clarifying.
Yes. He should be placed to do maximum damage.
Thanks for the comments!