The Diet in the China Study
See table p. 243. The China Study.
Eat all you want of fruit, vegetables, nuts and whole grains.
Minimize pastas (except whole grain varieties), white bread, crackers, sugar and most cakes and pastries, added vegetable oils and fish.
Avoid meat, poultry, dairy, eggs
Reading the relevant section in The China Study (p.242) it is clear that Dr. Campbell's advice is to try to eliminate all animal products (including fish) "but not obsess over it. If a tasty vegetable soup has a chicken stock base, or a hearty whole wheat bread contains a tiny amount of egg, don't worry about it. These quantities, very likely, are nutritionally unimportant." And being relaxed about this issue means it's much easier to eat the right things in quantity.
But Dr. Campbell does not recommend planning on including small amounts of animal protein (including fish) in your diet. The striking counter-example to "going all the way" is that of cigarette smoking. Would you advise someone who smokes to quit or to have a goal of only smoking two cigarettes a day? "It's in this way that I'm telling you that moderation, even with the best intentions, sometimes makes it more difficult to succeed."