Shū / fǎ / lǎo / shī / xiān / qīng / xǐ / yàn / cáo / zài / dào / rù / qīng / shuǐ / mó / mò

书法老师先清洗砚槽，再倒入清水磨墨。

The calligraphy teacher first cleans the inkstone trough and then adds water to grind the ink.