Zài zhēnshí de yǔyán huánjìng zhōng, kǒuyǔ tígāo de hěn kuài.
In a real language environment, spoken skills improve quickly.
Tips
usage
口语 (spoken/colloquial) vs 书面语 (written/formal language). Chinese has notable differences between spoken and written registers. Many words are used in 口语 but not 书面语, and vice versa.