New tea is not necessarily the better the newer it is, and improper drinking can easily hurt the stomach and intestines. Therefore, one should not drink too much new tea, and tea stored for less than half a month should not be drunk at all. Besides, new tea also contains a lot of caffeine, active alkaloids and many aromatic substances which may excite the central nervous system. Patients with neurasthenia or cardiovascular and cerebrovascular diseases should drink in moderation, and they should not drink before sleep or on an empty stomach -- a reminder from Jinma Lianhua.