Laotongjia preserved mutton (this is good, it is eaten in winter, and the thief is cold)
Xi an fanji lazhi meat
Lintong Huojing persimmon (My Sweetie, like a soft candy)
Demaogong Crystal Cake (with Xi 'an local characteristics)
Xifeng liquor (Donghu willow, Liulin wine)
Xi Anhuanggui thick wine (this kind of wine is similar to sweet wine, with low alcohol content, which is very suitable for hot drinking in winter)
Convenient beef and mutton buns (bringing strong northwest flavor to the northeast, convenient and delicious)
Slim pepper
Preserved kiwi fruit
Qiongguotang
Chinese chestnut
Big red date
walnut
Red bean in northern Shaanxi
Polygonum cuspidatum flower sugar
Gan Guo Xi an kui
Glutinous rice wine
Shitou cake
Persimmon vinegar
Babao jujube mirror cake
Wuren camellia oleifera powder
These are all good local flavors. It can't be wrong to take it back as a personal letter to your mother-in-law.
Or you can go to the entrance of the academy to buy a writing brush, copy calligraphy or Yin Shi. They are all good, but they are certainly not as affordable as the above local products.