Although NMT has been rapidly developed in recent years (Kalchbrenner and Blunsom, 2013;Sutskever et al., 2014;Bahdanau et al., 2015;Tu et al., 2016), Chinese-Portuguese MT has not received much at-tention using NMT because training data are not readily enough.
the performance is still low using these state-of-the-art approaches.