alt Hacker NewsThe trouble is that a billion people speak Mandarin already and many of them speak very good English as well, so your own skillset as a second language learner isn't very likely to be valuable. Unfortunately learning any language is rarely a valuable market skill on its own.
Right now Mandarin speakers in Europe are in high demand for contract support, it's different when you have a translator on a site with culture matching yours then having it in contractor's country.