The D visa isn't automatic for foreigners with Chinese spouses who have been in China for 5 years. You have to prove earnings and good character!
As for a 1 year L coz of Chinese wife, that's not cast in stone. But you'd get a half-year L, at least. Depends on the attitude of your wife's/husband's hometown PSB. I could've got a 1 year L by taking a medical. Bloody stupid. I refused that, why should I be forced to exit if, say, I became terminally ill? The visa regulations are a mess and nonsensical.
On a similar note, a Canadian who has taught legally in Yuncheng for 5 years tried to get a long residence permit as he has served the community well. There seems to be a provision for that in the law. But, basically he was brushed aside.