Course of Mathematical Statistics (Chen Xiru, Ni Guoxi, University of Science and Technology of China Press);
Complex function and its application (zhanghua's translation of Mathematics): A good book, with few sections, easy to read and understand, and clear description.
Concise Complex Analysis (Gong Sheng, Peking University Publishing House): When I was chatting with my teacher recently, the teacher recommended this book when asked about the complex function. I haven't bought it yet, but I believe it must be true. Gong Sheng is a great generation. Please search for details.