Specifically, in the process of sketching, students learnt to observe the shapes of the flowers first, felt the changes in the size and shade of plant leaves, and drew the outlines of flowers and the textures of leaves with vivid curves, thus shaping the rhythm of the pictures, and training students' ability to draw and outline. 

To put it in a nutshell, Sukhomlinsky once said, ‘To let the students experience the emotion of taking part in the mastery of knowledge is an important condition for arousing the special interest in knowledge of the youth.’ Therefore, allowing students to go out of the classroom and experience knowledge outside the classroom not only enriches students' sensory experience, but also increases their initiative and creativity in painting.