Switzerland is a place I've wanted to visit since I was 20, but I finally got there just before turning 30. Traveling solo in Europe was a gift to me. I wandered for almost a month, hiking the Nietzsche Trail in slippers; I joined a retired couple from Shanghai for a two-day trip, listening to their stories of studying abroad in Berlin in 1989; I stumbled upon the Nobel Residence, only to find it closed; and I got lost in a Swiss village with nearly 40 kilograms of luggage and no internet access. The whole journey felt like a puzzle game... While hiking the Nietzsche Trail, I heard passersby say that philosophy is a compulsory subject for the French, and that it was along this path that Nietzsche conceived his world-shaking philosophical works. Looking down at the muddy road, I imagined Nietzsche must have fallen many times.