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CONCENTRATION OF RISKS (Details) ¥ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 CNY (¥) item customer | Sep. 30, 2023 item | Dec. 31, 2023 CNY (¥)
CONCENTRATION OF RISKS |  |  |
Depreciation (appreciation) of RMB against US$ | (1.10%) |  | 1.70%
Customer Concentration Risk |  |  |
CONCENTRATION OF RISKS |  |  |
Number of customers who contributed more than 2% of Company's revenue | customer | 0 |  |
Cabinet and Bandwidth Supply |  |  |
CONCENTRATION OF RISKS |  |  |
Number of suppliers | item | 5 | 5 |
Bandwidth and Cabinet Resources | Supplier Concentration Risk | Largest five suppliers |  |  |
CONCENTRATION OF RISKS |  |  |
Concentration of risk, percentage | 43.00% | 43.00% |
Bandwidth and Cabinet Resources | Customer Concentration Risk | Aggregate local subsidiaries of a telecommunication carrier |  |  |
CONCENTRATION OF RISKS |  |  |
Concentration of risk, percentage | 5.00% | 6.00% |
Bandwidth and Cabinet Resources | Customer Concentration Risk | Customers on a stand-alone basis | Minimum |  |  |
CONCENTRATION OF RISKS |  |  |
Concentration of risk, percentage | 1.00% |  |
Revenue from contract with customer benchmark | Customer Concentration Risk |  |  |
CONCENTRATION OF RISKS |  |  |
Number of customer generated more than 10% but less than 20% of Company's revenue | customer | 1 |  |
Revenue from contract with customer benchmark | Customer Concentration Risk | Maximum |  |  |
CONCENTRATION OF RISKS |  |  |
Concentration of risk, percentage | 20.00% |  |
Revenue from contract with customer benchmark | Customer Concentration Risk | Minimum |  |  |
CONCENTRATION OF RISKS |  |  |
Concentration of risk, percentage |  | 10.00% |
PRC | Credit Concentration Risk |  |  |
CONCENTRATION OF RISKS |  |  |
Cash and cash equivalents, restricted cash and short-term investments, held at major institutions | ¥ | ¥ 1,971,126 |  | ¥ 2,431,089
Outside the PRC | Credit Concentration Risk |  |  |
CONCENTRATION OF RISKS |  |  |
Cash and cash equivalents, restricted cash and short-term investments, held at major institutions | ¥ | ¥ 18,058 |  | ¥ 426,022

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- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(9)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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