The Russian-Chinese phrasebook can be used, respectively, as a phrasebook and as a tool for learning Chinese. All Chinese words are written in Russian letters and are divided into 11 logical topics, that is, the phrasebook is designed for a Russian-speaking user (tourist). After passing the test on the selected topic, you can view the errors. Also, the result of passing the test for each of the topics is saved, your goal is to learn all the words in the selected topic by 100%. The application