您知道有要求提前多长时间去签证吗，签下来的有效期是根据我的行程来的还是有一个固定的期限？ The Schengen Tourist Visa processing time varies case by case. E.g. French and Swiss Embassies process in 2-3 weeks; Spanish Consulate issues to you in 2 hours (if you qualify); But you should at least give them 2-3 weeks to work, to be safe. The validation will depend on your itinerary and the dates you requested in the application form. If you are permanent resident of US, they might grant you a 3 months. But still, it varies. 看见签证要求有行程安排，是否要买了机票才能去签呢？要求出示酒店的预订，如果从荷兰领事馆申请签证，是否一定要在Holland停留住宿呢，转机行不行？ 转机行. Don't have to stay in a hotel for Holland entrance. You can choose KLM airline and it has to land in Amsterdam anyway. Then you can transfer to Greece once you enter the custom. But, you need to circle "transit" on your application form. And you'd better show them the return ticket.