Cultural Insight:
"Yin" and "Yang" are core concepts in ancient Chinese philosophy. They represent the idea that all things in the universe consist of two opposing yet unified aspects. For example: female is Yin, male is Yang; night is Yin, day is Yang; cold is Yin, hot is Yang. These two forces are not absolutely opposed but are interdependent and constantly changing. This thinking has influenced Chinese medicine, martial arts, diet, and even daily behavior, emphasizing balance and harmony.

Useful Sentences:

1. 这件事有好有坏。 - This matter has both good and bad sides.

2. 我们需要找到平衡。 - We need to find a balance.

3. 冬天冷，夏天热。 - Winter is cold, summer is hot.

4. 问题虽然难，但是我能解决。 - Although the problem is difficult, I can solve it.

Grammar Corner: The Conjunction "虽然...但是... (suīrán... dànshì...)"
This structure is equivalent to "Although... but..." in English. Note: In English, "although" and "but" are not used together in the same clause, but in Chinese, "虽然" and "但是" must be used together.

• Structure: 虽然 + A， 但是 + B

• Examples:

• 虽然今天下雨，但是我不冷。 - Although it's raining today, I'm not cold.

• 虽然汉语很难，但是很有意思。 - Although Chinese is difficult, it is very interesting.

Exercise:
Use "虽然...但是..." to connect the sentences.
他很小。/ 他懂很多事情。
→ 虽然他很小，但是他懂很多事情。