1. People & greetings
You, I, he/she, teacher, classmate, friend; hello, goodbye, thanks, sorry; what is your name / I am...
2. Numbers, time, calendar
0–100 (or at least 0–20 + tens); today / tomorrow / yesterday; weekdays; hour / minute; now / before / after.
3. Family & personal basics
Family titles you need for self-intro; age; student / work (as relevant); home / school.
4. Food, drink, money
Water, rice, tea, coffee, fruit basics; eat / drink / want; yuan / how much; delicious / a little.
5. Places & movement
Home, school, shop, restaurant; go / come / return; here / there; where.
6. Daily verbs & classroom
Look, listen, speak, read, write, study, know, like, can (ability); open book / please / again.
7. Adjectives & simple quality
Big/small, many/few, good/bad, hot/cold, expensive/cheap, busy/free (as your lessons introduce them).
8. Function words you cannot skip
Yes/no answers, question particles your textbook uses, measure words for people/things/lessons, basic connectors (and / but / because—as introduced).
Coverage check: If you can introduce yourself, buy a drink, say where you are going, and answer a slow classroom question, your 150-core is working—even if a few rare list items are still shaky.