In the markets now, Kumquats-金橘 (Jīn jú) (gold orange).
These are the tiny oranges about 2cm diameter. No need to peel, just wash and eat. Also good for making jam, for those who can do that.
A good source of vitamin C and bioflavonoids. According to TCM, good for stimulating appetite and aiding digestion. Also good for the vascular system, cutting cholesterol and reducing blood pressure.
The season for fresh kumquats is quite short, but they are very cheap (10rmb/Kg). This is followed by a period of kumquats preserved in sugar, but these are much more expensive.