Keri Folmar had a post at The Gospel Coalition about what to look for in a Bible study leader. She speaks with regard to women, but I think these characteristics could apply to both men and women. And I would add that Bible study leaders need to be continually learning about the Bible. There are ways other than seminary to increase our Bible knowledge, whether it is courses or workshops or just developing a reading plan. Understanding the nature of Scripture and interpretation is very helpful for discerning how to teach it.
Kevin DeYoung evaluates systematic theologies. My favorite sytematic theology is Berkhof's, which I find easier to understand (and more interesting) than some of the ones written more recently. If you are a newbie to systematic theology, you can't do much better than R. C. Sproul's Everyone’s a Theologian.
An update on crackdown on churches in China - Sharing a Bitter Cup. May the Lord preserve our brothers and sisters by His grace as they persevere.
“When we got to the police station, I remembered those brothers and sisters who had worshipped and prayed here before. When I realized that we got to share with them in the bitter cup of the Lord, my heart was continually grateful.”