What we need is a sticky of all the Christian-Tarot-reader threads.
Look at it this way: Tarot is more than 500 years old and originates in Europe, which was heavily Christian at the time. The rise of Wicca and neopaganism is about 50 years old. So the people who have been doing the most Tarot for most of its history have been Christian. Now, of course, it's popular worldwide with people of all religions.
"The lot is cast into the lap, but its every decision is from the Lord." Proverbs 16:33
Casting lots is an ancient form of divination. There is a *lot* of divination in the Bible. Don't let some sweaty, shouting, red-in-the-face preacher tell you about Christian theology. I have studied a lot of Christian theology, and by and large, the loud shouting in-your-face bigots are not well-versed in theology at all (I've heard people shout at me that they don't need theology; they have the Bible. These are the people to ignore. If they were secure in their relationship with God, they would not be so angry, defensive and insecure).
In the end, you have to find your own way.
PS. I wrote the above without realizing you were in China. Many of my Asian Christian friends are especially wary of doing anything they didn't learn from a clergyman because they have heard that many things are evil. I had a friend from China who had been told that the following were evil: meditating, yoga, martial arts. She was afraid to relax her muscles to sleep at night because some preacher told her that when she relaxed her muscles one group at a time, a spirit guide would appear to lead her away from God. This was complete nonsense. I know a large group of Christians from Korea, and they, too, had been told that things like meditating are evil. It's a real shame.