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LONG-TERM INVESTMENTS | 12 Months Ended
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Dec. 31, 2019
Long-term investments |
LONG-TERM INVESTMENTS | 8. LONG-TERM INVESTMENTS Long-term investments as of December 31, 2018 and 2019 were as follows:
|  | As of December 31,
|  | 2018 |  | 2019
Equity securities without a readily determinable fair value: |  |  |  |
Xixi |  | 11,000 |  | —
Longyan Huiyuan |  | 140 |  | 140
Total |  | 11,140 |  | 140
In June 2015, the Group purchased 5.21% equity interest in Shanghai Xixi Maternal and Baby Care Service Co., Ltd. ("Xixi") at the consideration of RMB11,000. In September 2017, the Group purchased 1% equity interest in Longyan Huiyuan Pharmacy Co., Ltd. ("Longyan Huiyuan") at the consideration of RMB140. The Group measures its equity securities without a readily determinable fair value at its cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. Nil, nil and RMB 11,000 impairment was recorded for the Group's long-term investments for the years ended December 31, 2017, 2018 and 2019.

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