How about Zhang Jiajian and Sheng Hui?

All right. According to relevant information, Zhang Jiajian is a good professional and respected teacher. Zhang Jiajian, born in 1956, is a member of China Hard Pen Calligraphy Association, Shanghai Wu Changshuo Art Research Association, Shanghai Contemporary Hard Pen Calligraphy and Painting Institute, Shanghai Changning Calligraphers Association and Shanghai Academy of Fine Arts.