We can use to-infinitives to express purpose.

e.g. I often go to the market to watch the birds

Now the Chinese government has made laws to prevent all these things.

We can also use in order to to express purpose. This is more formal than using to-infinitives.

e.g. Some people want to make the wetlands smaller in order to have more space for farms and buildings.

Take a notebook with you in order to write down what you see.