hi Sanem, i would like to give it a shot to your question. you're the querent, thus Cancer, significator the Moon. a foreign language-Chinese is of 9th matter, so quesited Aquarius, thus significator Saturn. Moon is applying to Saturn for a sextile. i think the anwser is "Yes", you should learn Chinese.
now let's have a closer look at the career concerned learning. Career is 10th, so Pisces is ruled by Jupiter. Jupiter is very dignified since it's in Sag. in addition, the ASC degree is at 15° Cancer, is the exaltation degree of Jupiter as well. adding to the separating Moon sextile Jupiter aspect everything seems to show that you are probably very very conscious of this issue---learning Chinese, this foreign language for the career concerns. and you might be already on the go for it. but please note that Chinese in this chart is reprented by Saturn very debilitated, he is retrograded, in detriment and in cadent house---this shows the potential obstacles of this language---personally i think this might indicate the level of difficulty for you, as Chinese is recognized as one of the most difficult languages of the world, but at the same time, the speakers are already a lot---all the Chinese population so the competition would be rude. but the significator of you---the consultant--the Moon is in Libra, the sign of China. so in sythesizing everything, i would say that given your desire and career concerns, you should learn Chinese, but probably not to the perfection---you might probably learn some usesful business conversations sufficiently for general affairs, but you might not become a sinologue due to the difficulties around this language.
it's just my 2 cents. wish it useful.
