Everyone at my school knows that I am a Christian, so do a lot of people in town. So I guess I'm not trekking down such a safe road as you think I am. Safe would be just to say nothing. But I am a professional teacher and not a professional preacher. I've heard of this saying "If you don't stand on a soap box, support the ones that do." I support financially and with prayers those that are called to do that. Notice though that a "soap box" is better used outside than inside. If I had a teacher of Arabic, in their class I expect to be taught Arabic and not be indoctrinate into becoming a Muslim either. Muslims are also commanded to spread their faith. The Chinese are best suited to change themselves. I have known of Christians who come to China and three months later get deported for standing in the middle of the road. How much of an impact do you think they had? However, a person who stays longer and mentors individuals can do much greater good. I am not telling people not to spread their faith, just to pick their spots better- that's it. In China, you have to know how to do it with a long impact than just a few months stay. I am not an expert at this. But I've know American pastors who come to China and visit churches to preach, then when everyone goes home is where the Christianity gets spread.
It is good that you read the bible, even though you are an agnostic. When Paul was confined to house arrest in Rome, he preached in his house do he not? He did not get onto a balcony or run into the street to do it, but he still did it within the situation he was put in.