If you want to share your thoughts and opinions in Mandarin, here are some easy vocabulary themes to help you out:

1. Talking About Opinions:

   • 我认为 (Wǒ rènwéi) - "I think..."
   • 在我看来 (Zài wǒ kàn lái) - "In my view..."

2. Business and Money:

   • 市场经济 (Shìchǎng jīngjì) - "market economy"
   • 投资回报 (Tóuzī huíbào) - "return on investment"

3. Technology and New Ideas:

   • 人工智能 (Rén gōng zhì néng) - "artificial intelligence"
   • 创新 (Chuàngxīn) - "innovation"

4. Cultural Topics:

   • 文化多样性 (Wénhuà duōyàngxìng) - "cultural diversity"
   • 传统与现代 (Chuántǒng yǔ xiàndài) - "tradition and modernity"

5. Environmental Words:

   • 可持续发展 (Kě chíxù fāzhǎn) - "sustainable development"
   • 零碳排放 (Líng tàn páifàng) - "zero carbon emissions"

6. Health Terms:

   • 疫苗 (Yìmiáo) - "vaccine"
   • 心脏病 (Xīnzàng bìng) - "heart disease"

7. Travel and Visiting Places:

   • 观光旅游 (Guānguāng lǚyóu) - "sightseeing tour"
   • 文化遗产 (Wénhuà yíchǎn) - "cultural heritage"

8. Social Topics and Rights:

   • 社会公正 (Shèhuì gōngzhèng) - "social justice"
   • 人权 (Rénquán) - "human rights"

Using these words and phrases can help you express your ideas clearly. They will make your speaking and writing in Mandarin stronger and more convincing!