@linka999, thank you for taking the time to type all those, I had no idea there were so many in Chengdu. If you’d like to try (or show your western friends) a different, I think better, Sandwich shop, you could try Leanna’s Bakery.
莲娜西点坊
4 Shuhan Jie No. 1, Chengdu Map
成都蜀汉街4号附1号 – I think they are open until 21:00 these days.
the bread there is different, but also delicious