Answer: Yes, your plan to travel from Xi'an to Zhangye on train T269 and then from Zhangye to Lanzhou is feasible, though it will be a tight schedule. Let's break down the details:

Answer: Finding a private taxi in Zhangye for a 2-day itinerary is possible, but direct WeChat contacts are not widely published online. Most travelers arrange private taxis through local hotels, travel agencies, or online platforms that specialize in China travel services.