Information System Learning Robust Models for e-Commerce Product Search [ACL 2020] Thanh V. Nguyen, Nikhil Rao, Karthik Subbian. Motivation: improve the ability of similarity in query-item recall between two most similar item. Classification + Query Generators. Firstly, pre-trained classification and query generation. classification = LSTM + attention + FFN (which have improvement) query generation: seq2seq, encoder is classification, decoder is LSTM + Attention use beam search. using one latent to joint this two part. in online test, improve 12.2%, 5.75% in two countries.