which passport would be better to travel to China for tourism, and which is procedure I must follow?

Johanna, the passport you held when you entered Netherlands is the one you need to apply for PRC L type. You need to apply at CVASC in Hague. Firstly, submit some required materials: your passport and its photocopy, the application form and your recent color photo, the residence permit in Netherlands and return air tickets, hotel booking records as well as your itinerary. And then wait for the result.