Annual Report 2019

HOP FUNG GROUP HOLDINGS LIMITED 合豐集團控股有限公司 110 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS 綜合財務報表附註 FOR THE YEAR ENDED 31ST DECEMBER, 2019 截至二零一九年十二月三十一日止年度 4. 估計不明朗因素之主要來源 在應用本集團載述於附註 3 的會計政策時，本 公司董事須對未能輕易地從其他來源確定的資 產及負債賬面值作出估計及假設。該等估計及 相關假設是根據過往經驗及被認為相關的其他 因素而作出。實際結果或會與該等估計有所不 同。 該等估計及相關假設會持續地檢討。若估計修 訂只影響該時期，會計估計的修訂會於該期內 確認；或如該估計修訂影響本期及未來期間， 則會計估計的修訂會於修訂期及未來期間確 認。 於報告期末，有關未來主要假設以及用以估計 不明朗因素之其他主要來源如下，該等假設存 有導致下一財政年度資產及負債賬面值需作大 幅調整的重大風險。 與箱板紙分部有關的物業、廠房及設備之 估計減值評估 於釐定資產是否減值時，本集團須作出判斷及 估計，尤其需要評估： (1) 是否發生可能影響資 產價值的事件或任何跡象； (2) 資產的賬面值能 否以使用價值（即根據持續使用資產估計的未 來現金流量之現值淨額）的可收回金額支持；及 (3) 估計可收回金額時所採用的適當主要假設， 包括現金流量預測及適當貼現率。倘無法估計 個別資產的可收回金額，則本集團會估計該資 產所屬現金產生單位的可收回金額。假設及估 計（包括現金流量預測的貼現率、增長率或毛 利率）變動，可能會對減值測試中使用的現值 淨額產生重大影響。 4. KEY SOURCES OF ESTIMATION UNCERTAINTY In the application of the Group’s accounting policies, which are described in note 3, the directors of the Company are required to make estimates and assumptions about the carrying amounts of assets and liabilities that are not readily apparent from other sources. The estimates and associated assumptions are based on historical experience and other factors that are considered to be relevant. Actual results may differ from these estimates. The estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognised in the period in which the estimate is revised if the revision affects only that period, or in the period of the revision and future periods if the revision affects both current and future periods. The following are key assumptions concerning the future, and other key sources of estimation uncertainty at the end of the reporting period, that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year. Estimated impairment assessment of property, plant and equipment relating to the containerboard segment In determining whether an asset is impaired, the Group has to exercise judgment and make estimation, particularly in assessing: (1) whether an event has occurred or any indicators that may affect the asset value; (2) whether the carrying value of an asset can be supported by the recoverable amount, in the case of value-in-use, the net present value of future cash flows which are estimated based upon the continued use of the asset; and (3) the appropriate key assumptions to be applied in estimating the recoverable amounts including cash flow projections and an appropriate discount rate. When it is not possible to estimate the recoverable amount of an individual asset, the Group estimates the recoverable amounts of the cash- generating units to which the assets belong. Changing the assumptions and estimates, including the discount rates, the growth rates or gross margin in the cash flow projections, could materially affect the net present value used in the impairment test.