I purchased my Jinma 304 in 2012 as a package deal with my 18 acre (2 acres in cultivation) farm. It was the worst decision I have made this year.
From the start I have had one thing after another go wrong with it. The previous owner had to replace the block in it within 150 hours of use. After 250 hours of use the oil pump has gone bad. The 1st/reverse yolk in the gear box sheared off. The seal in the front left wheel has gone bad, spilling oil all over the rim. The hydraulics are weak as a kitten. I use a 5 foot tiller and bush hog with the tractor and I hardly have enough power to run them.
I believe the concept of making a tractor that is half the price of a JD or Kubota is that you should just buy 2 so that you have 1 as back up when the first one breaks down, because it will.
If you are considering buying one of these tractors please save yourself the headache and buy something reliable.