How to solve the problem about too much "unk" in Enlish-Chinese translate?

[PengboLiu (Patrick Liu)]

I use OpenNMT(pytorch)

[guillaumekln (Guillaume Klein)]

See:

Chinese to english translation many unknown words

Usually this means: the model is not trained enough (not enough training data, too few iterations, too small model, etc.) or the test data contains a lot of out of vocabulary words (out of domain data, different tokenization, etc.)

[openwind (Robert Cheng)]

It’s going to take some time for the NMT to get trained for “perfection” in languages…