What does it mean to wash the inkstone to make a poem of spring wave, stick to the piano and rain at night?

Self-cultivation couplets originated from the ancients: washing inkstones in spring, burning incense at night and reading pottery poems. Washing inkstones refers to the famous sin inkstone pool, gold iron refers to Copybook for calligraphy represented by Wang Xizhi, and pottery poems refer to Tao Yuanming's poems. Tao Yuanming is the ancestor of the school of pastoral poetry, and Wang Xizhi is a giant of calligraphy. They are recognized as representatives of the field of poetry and calligraphy. The meaning of this couplet is to copy Wang Xizhi's copybook when reading and Tao Yuanming's poems when reading, so as to achieve the purpose of self-cultivation and self-cultivation.