[求问]父母访问签证申请，机票、医疗保险如何提供？

lufthansa

check list 上要求包括如下两项：
9 d. x8 u" m" A5 M+ C) B) n4 C1）Photocopy of your valid return ticket and/or travel itinerary, if applicable 因为只有拿到签证后才会购买机票，此项文件可否不提供？
- u. q- X/ M# K% h2）Proof of medical insurance coverage for one year with a Canadian insurance company (copy of the insurance certificate or policy) 这一项材料大家一般是如何处理的？