China fines Nissan venture in anti-monopoly case

Too small of a fine,I doubt this will become a deterrent for the future.

Setting minimum retail prices is common in other countries but Chinese regulators reject it as a violation of free market competition.

It is a common practice in developing countries. Price fixing is illegal just about everywhere else, including Japan. There are almost a dozen Japanese citizens in American jails right now who were convicted of price fixing, America punishes these offenders seriously. However, in Japan price fixing laws are not enforced, visit any movie theater and you will see a blatant disregard for Japanese price fixing laws (every theater in Japan charges the same price for a ticket) but of course no one is ever charged.

"Regulators deny foreign companies are treated unfairly."

I wouldn't be so quick to condemn Nissan in this case. The Chinese government is known to enforce rules against foreigners while looking the other way with domestic companies ( in which many of the Chinese communist party members have an interest in)

Japanese popular custom of screwing their citizens.

I don't understand what part is considered to be a monopoly, and what criteria China uses to decide whether a company monopolizes some economic section.

In USA, price fixing by auto parts makers were parts makers gang up to ensure parts are not cheap so that automakers price is high. Toyota had been victim of price fixing. More expensive tires etc. (Bridgestone case etc)