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GUANGSHEN RAILWAY 2021 ANNUAL REPORT6 FIXED ASSETS — NETCommunications Tracks, bridges Locomotives and and signalling Other machinery Buildings and service roads rolling stock systems and equipment TotalRMB’000 RMB’000 RMB’000 RMB’000 RMB’000 RMB’000At 1 January 2020Cost 7,825,870 14,817,730 8,102,522 1,852,565 6,757,634 39,356,321 Accumulated depreciation (3,141,585) (3,716,630) (2,905,802) (1,415,922) (4,579,251) (15,759,190) Impairment (23,578) — — — (7,472) (31,050) Net book amount 4,660,707 11,101,100 5,196,720 436,643 2,170,911 23,566,081 Year ended 31 December 2020Opening net book amount 4,660,707 11,101,100 5,196,720 436,643 2,170,911 23,566,081 Other additions 4,196 — 47,666 2,178 98,138 152,178 Transfer in from construction-in-progress (Note 7) 396,446 198,800 1,932 28,733 154,590 780,501 Transfer out to construction-in-progress for improvement/ modifications (Note 7) (129) (231,996) (434,216) (9,759) (9,028) (685,128) Transfer in from construction-in-progress after repair 6,291 292,244 744,298 38,726 20,241 1,101,800 Reclassifications — — — 45 (45) —Disposals (26,206) (95,020) (68,749) (5,747) (29,281) (225,003) Depreciation charges (335,123) (218,396) (669,210) (90,451) (348,999) (1,662,179) Impairment charge — — (11,835) — — (11,835) Closing net book amount 4,706,182 11,046,732 4,806,606 400,368 2,056,527 23,016,415 At 31 December 2020Cost 8,183,873 14,896,863 7,750,874 1,829,279 6,837,991 39,498,880 Accumulated depreciation (3,454,113) (3,850,131) (2,932,433) (1,428,911) (4,773,992) (16,439,580) Impairment (23,578) — (11,835) — (7,472) (42,885) Net book amount 4,706,182 11,046,732 4,806,606 400,368 2,056,527 23,016,415