Hi I am from India I am applying for intensive z visa how much it costs and how many years valid vis

Hi, what do you mean by intensive Z?
In general, the ordinary Work Z is a single entry type and the fee is 3900Rs for applying in India. After you get the Z, you need to change it to a resident permit. With the permit, you can stay in China for as long time as you want. Usually, the duration depends on your work.