- Online Optimization Algorithm (SGD, TG, FOBOS, RDA, FTRL)
- Data Science (NN, Decision Tree, Regularization Regression, SVM, PCA, SVD, Text Mining)
- Meta Heuristic Algorithm(GA, SA)
- Text Mining (TF-IDF, TextRank, HMM, KNN)
- R language (ggplot2, R markdown)
- Python (numpy, jieba)
- Hadoop (with R, Python), Spark (with R, Python)
- China history (Qin Dynasty)
- Thinking Skills