It's weird to use the word superstition to describe the anti-GMO opinion in China or elsewhere. European countries have totally forbidden sales of GM food for a long time until recently. The new European laws imposed strict regulations on GM food sale. The China's debate on GMO products mainly focused on lack of registrations, regulations and monitoring of GM food.
Strange enough! China is the world's largest food producer that yields over 600M tons of grains per year. Still we are known to be the world's largest importer of food. About 85% of our 70M ton food import is soy beans, and the rests are corns and agriculture products for starch production. We consume three times more grain type food per capita than those of Indians. In theory we don't have to import food but waste of food is a huge problem in China.
We are self sufficient on food issues. Our main crop import including soy beans and corns is only needed for food processing industry. Abuse of GMO seeds could cause ecological disasters.
If Chinese reject it, it's superstition. When Europeans do it, it's because they are sophisticated.