China Orange Fruit Plant In 10 Inch Black Nursery Pot

If by “China orange plant” you mean the orange tree commonly associated with China, it is usually the sweet orange:

Sweet Orange

Key facts:

• Native ancestry traces to southern China and nearby regions of Southeast Asia.
• Evergreen fruit tree that can grow about 3–10 m (10–33 ft) tall.
• Produces fragrant white flowers and orange-colored fruits rich in vitamin C.
• Prefers full sun, well-drained soil, and warm climates.
• Commonly grown in subtropical and tropical regions around the world.

If you’re asking about a specific plant called “China orange” (for example, a local nursery variety or ornamental plant), please share a photo or more details and I can identify it more precisely.