Question: 在2021年02月12日至2021年06月24日期间，中国建筑的三指数移动平均10日线和30日线共出现几次死叉？（平滑系数 alpha 取 2 / (n + 1)；从前 6n 个数据开始计算；初始值用首个数据点）使用不复权价格，写出指标公式，搜集原始数据，计算得出答案，保留四位小数。注意列出原始数据和关键计算过程。
Formula: TEMA = 3 * EMA1 - 3 * EMA2 + EMA3；EMA1 = EMA_n(P)；EMA2 = EMA_n(EMA1)；EMA3 = EMA_n(EMA2)
Data:
date,close
2020-05-22,5.01
2020-05-25,5.01
2020-05-26,5.01
2020-05-27,5.01
2020-05-28,5.01
2020-05-29,5.0
2020-06-01,5.06
2020-06-02,5.12
2020-06-03,5.07
2020-06-04,5.04
2020-06-05,5.04
2020-06-08,5.06
2020-06-09,5.09
2020-06-10,5.04
2020-06-11,5.01
2020-06-12,5.01
2020-06-15,4.97
2020-06-16,5.03
2020-06-17,5.04
2020-06-18,5.08
2020-06-19,5.11
2020-06-22,5.0
2020-06-23,5.0
2020-06-24,4.84
2020-06-29,4.77
2020-06-30,4.77
2020-07-01,4.89
2020-07-02,4.98
2020-07-03,5.08
2020-07-06,5.48
2020-07-07,5.4
2020-07-08,5.46
2020-07-09,5.48
2020-07-10,5.27
2020-07-13,5.34
2020-07-14,5.28
2020-07-15,5.17
2020-07-16,5.05
2020-07-17,5.05
2020-07-20,5.22
2020-07-21,5.22
2020-07-22,5.18
2020-07-23,5.19
2020-07-24,5.06
2020-07-27,5.03
2020-07-28,5.03
2020-07-29,5.08
2020-07-30,5.04
2020-07-31,5.03
2020-08-03,5.08
2020-08-04,5.14
2020-08-05,5.07
2020-08-06,5.06
2020-08-07,5.11
2020-08-10,5.22
2020-08-11,5.14
2020-08-12,5.32
2020-08-13,5.29
2020-08-14,5.3
2020-08-17,5.35
2020-08-18,5.27
2020-08-19,5.23
2020-08-20,5.17
2020-08-21,5.18
2020-08-24,5.17
2020-08-25,5.15
2020-08-26,5.1
2020-08-27,5.1
2020-08-28,5.2
2020-08-31,5.14
2020-09-01,5.16
2020-09-02,5.1
2020-09-03,5.07
2020-09-04,5.05
2020-09-07,5.01
2020-09-08,5.11
2020-09-09,5.04
2020-09-10,5.03
2020-09-11,5.02
2020-09-14,5.03
2020-09-15,5.06
2020-09-16,5.08
2020-09-17,5.05
2020-09-18,5.24
2020-09-21,5.24
2020-09-22,5.18
2020-09-23,5.14
2020-09-24,5.07
2020-09-25,5.09
2020-09-28,5.08
2020-09-29,5.05
2020-09-30,5.08
2020-10-09,5.1
2020-10-12,5.15
2020-10-13,5.11
2020-10-14,5.11
2020-10-15,5.12
2020-10-16,5.12
2020-10-19,5.11
2020-10-20,5.07
2020-10-21,5.09
2020-10-22,5.05
2020-10-23,5.11
2020-10-26,5.22
2020-10-27,5.18
2020-10-28,5.15
2020-10-29,5.12
2020-10-30,5.11
2020-11-02,5.1
2020-11-03,5.16
2020-11-04,5.23
2020-11-05,5.27
2020-11-06,5.37
2020-11-09,5.31
2020-11-10,5.27
2020-11-11,5.37
2020-11-12,5.31
2020-11-13,5.25
2020-11-16,5.29
2020-11-17,5.32
2020-11-18,5.31
2020-11-19,5.31
2020-11-20,5.33
2020-11-23,5.42
2020-11-24,5.44
2020-11-25,5.37
2020-11-26,5.4
2020-11-27,5.5
2020-11-30,5.43
2020-12-01,5.51
2020-12-02,5.5
2020-12-03,5.38
2020-12-04,5.3
2020-12-07,5.21
2020-12-08,5.17
2020-12-09,5.15
2020-12-10,5.14
2020-12-11,5.1
2020-12-14,5.09
2020-12-15,5.08
2020-12-16,5.1
2020-12-17,5.12
2020-12-18,5.14
2020-12-21,5.07
2020-12-22,5.02
2020-12-23,5.0
2020-12-24,4.97
2020-12-25,5.0
2020-12-28,4.95
2020-12-29,4.95
2020-12-30,4.94
2020-12-31,4.97
2021-01-04,4.91
2021-01-05,4.88
2021-01-06,4.95
2021-01-07,4.92
2021-01-08,4.96
2021-01-11,4.87
2021-01-12,4.94
2021-01-13,5.09
2021-01-14,5.14
2021-01-15,5.03
2021-01-18,5.04
2021-01-19,5.06
2021-01-20,5.04
2021-01-21,5.02
2021-01-22,4.94
2021-01-25,4.9
2021-01-26,4.88
2021-01-27,4.89
2021-01-28,4.83
2021-01-29,4.81
2021-02-01,4.83
2021-02-02,4.82
2021-02-03,4.77
2021-02-04,4.69
2021-02-05,4.74
2021-02-08,4.77
2021-02-09,4.8
2021-02-10,4.8
2021-02-18,4.85
2021-02-19,4.98
2021-02-22,5.0
2021-02-23,4.95
2021-02-24,4.94
2021-02-25,5.13
2021-02-26,5.05
2021-03-01,5.06
2021-03-02,4.99
2021-03-03,5.02
2021-03-04,5.03
2021-03-05,5.03
2021-03-08,4.99
2021-03-09,5.01
2021-03-10,4.95
2021-03-11,4.99
2021-03-12,5.12
2021-03-15,5.18
2021-03-16,5.19
2021-03-17,5.16
2021-03-18,5.16
2021-03-19,5.05
2021-03-22,5.21
2021-03-23,5.15
2021-03-24,5.15
2021-03-25,5.17
2021-03-26,5.14
2021-03-29,5.16
2021-03-30,5.11
2021-03-31,5.19
2021-04-01,5.22
2021-04-02,5.2
2021-04-06,5.17
2021-04-07,5.2
2021-04-08,5.14
2021-04-09,5.14
2021-04-12,5.21
2021-04-13,5.18
2021-04-14,5.2
2021-04-15,5.19
2021-04-16,5.22
2021-04-19,5.25
2021-04-20,5.24
2021-04-21,5.17
2021-04-22,5.14
2021-04-23,5.09
2021-04-26,5.02
2021-04-27,4.98
2021-04-28,4.97
2021-04-29,5.0
2021-04-30,4.94
2021-05-06,4.97
2021-05-07,4.99
2021-05-10,5.0
2021-05-11,5.02
2021-05-12,5.03
2021-05-13,5.0
2021-05-14,5.02
2021-05-17,5.0
2021-05-18,4.99
2021-05-19,4.94
2021-05-20,4.95
2021-05-21,4.92
2021-05-24,4.86
2021-05-25,4.97
2021-05-26,4.97
2021-05-27,4.96
2021-05-28,4.9
2021-05-31,4.89
2021-06-01,4.91
2021-06-02,4.9
2021-06-03,4.88
2021-06-04,4.89
2021-06-07,4.87
2021-06-08,4.86
2021-06-09,4.89
2021-06-10,4.86
2021-06-11,4.92
2021-06-15,4.86
2021-06-16,4.88
2021-06-17,4.83
2021-06-18,4.83
2021-06-21,4.81
2021-06-22,4.79
2021-06-23,4.81
2021-06-24,4.87

Indicator data:
date,10日,30日
2020-09-24,5.144851171634656,5.108742860702065
2020-09-25,5.124382137613668,5.104322956670139
2020-09-28,5.105723618619078,5.098694886351038
2020-09-29,5.079610903312441,5.08839386334035
2020-09-30,5.076036188484833,5.0849013183965255
2020-10-09,5.0832327582262264,5.085568288307037
2020-10-12,5.1111142282643796,5.0953153300576295
2020-10-13,5.11178016709727,5.0966719653970305
2020-10-14,5.112076750190092,5.097922194108031
2020-10-15,5.116655618801479,5.100886913429145
2020-10-16,5.1195495831556865,5.103531139181877
2020-10-19,5.116748287003646,5.104072511350622
2020-10-20,5.096590957154052,5.0973280654990605
2020-10-21,5.092175906823465,5.095093994676943
2020-10-22,5.071360300785229,5.085936964365321
2020-10-23,5.084990767461702,5.08886708614952
2020-10-26,5.144293756102757,5.111446749487229
2020-10-27,5.165641652167549,5.123987231018495
2020-10-28,5.16546381446153,5.129509421309101
2020-10-29,5.150804127573905,5.128866961867157
2020-10-30,5.135736343469891,5.126451085538883
2020-11-02,5.120732022429403,5.122488318500252
2020-11-03,5.137734395329245,5.129874070174748
2020-11-04,5.180671200583316,5.14900063963774
2020-11-05,5.22689888650763,5.172928851918951
2020-11-06,5.3017828078559335,5.211885945147637
2020-11-09,5.322594301168804,5.2349058615335595
2020-11-10,5.315717073466288,5.247533171322063
2020-11-11,5.353833793326168,5.276415696781081
2020-11-12,5.349717889536634,5.290468070528185
2020-11-13,5.317361654479534,5.291499768241589
2020-11-16,5.311952999089399,5.299264353393552
2020-11-17,5.3206063764639255,5.311110375375359
2020-11-18,5.320726755414916,5.319263875992135
2020-11-19,5.319749963928348,5.325988298672653
2020-11-20,5.32724460058005,5.335084726903473
2020-11-23,5.372145951323832,5.358945071656082
2020-11-24,5.410092959675625,5.383005856700889
2020-11-25,5.4021404096127075,5.390877821362254
2020-11-26,5.4086766607865115,5.402693306472005
2020-11-27,5.456801730652364,5.430646909169776
2020-11-30,5.455596467593228,5.441865789703834
2020-12-01,5.489066806391196,5.465610198530364
2020-12-02,5.5050040272343415,5.483973358603742
2020-12-03,5.459295573528464,5.477650125212797
2020-12-04,5.390963618166256,5.45698542694602
2020-12-07,5.304154025816233,5.422015292886916
2020-12-08,5.228994683760691,5.383685686901488
2020-12-09,5.1719717494234345,5.346155036755891
2020-12-10,5.1324997749767585,5.3112485820094255
2020-12-11,5.091685501954748,5.273302222957065
2020-12-14,5.063825726298253,5.23823600421293
2020-12-15,5.044775084184377,5.2057874024610635
2020-12-16,5.045118530849092,5.181156143659365
2020-12-17,5.0581272687682715,5.163436255949458
2020-12-18,5.07905408751069,5.1518135861756775
2020-12-21,5.063897012373273,5.12923754827038
2020-12-22,5.0332792955969055,5.100738294418946
2020-12-23,5.0059933692236065,5.07255116551483
2020-12-24,4.976608341204437,5.042884617454112
2020-12-25,4.9731177920889165,5.022863152148577
2020-12-28,4.950706909751343,4.996823045634219
2020-12-29,4.938139065846727,4.974623261804965
2020-12-30,4.927606032147814,4.954012809213859
2020-12-31,4.936400091079894,4.942079722881557
2021-01-04,4.9171236308258175,4.921439437282268
2021-01-05,4.892449478502747,4.898637308953716
2021-01-06,4.909509126572726,4.89210731908609
2021-01-07,4.909054836474291,4.881695922174847
2021-01-08,4.928159222585357,4.880576232609319
2021-01-11,4.901190650309616,4.864003199754849
2021-01-12,4.915673349647345,4.862915930541212
2021-01-13,4.994027271438763,4.889882974033836
2021-01-14,5.068955834905183,4.923208223068979
2021-01-15,5.067896084126473,4.932983434191178
2021-01-18,5.069769677699842,4.9438332746547315
2021-01-19,5.078302109557623,4.957391850159198
2021-01-20,5.073279405530638,4.966019317316582
2021-01-21,5.0593271029784015,4.9702876043751605
2021-01-22,5.012583044563899,4.959830710860488
2021-01-25,4.962635722735407,4.943735590344485
2021-01-26,4.92047023751204,4.926353814793252
2021-01-27,4.897824206286382,4.9133148559290625
2021-01-28,4.857006896275011,4.891407188618984
2021-01-29,4.8224945378461594,4.869020482061029
2021-02-01,4.810716805246486,4.853507469419421
2021-02-02,4.8007076862975,4.838599911232873
2021-02-03,4.7736923432005405,4.816988473355448
2021-02-04,4.721768437856977,4.784097012730104
2021-02-05,4.712361950724703,4.764955614508899
2021-02-08,4.722540328188653,4.754263914680671
2021-02-09,4.745458263788834,4.75098021820674
2021-02-10,4.762730062079756,4.748732235472092
2021-02-18,4.79824272949402,4.756439287692872
2021-02-19,4.881503092126096,4.787333145413156
2021-02-22,4.9458287011980335,4.81849910278822
2021-02-23,4.964585688476382,4.83711003229691
2021-02-24,4.970396003087837,4.851906153783159
2021-02-25,5.058013012745282,4.899572537384186
2021-02-26,5.077673150476579,4.926952492528841
2021-03-01,5.091967006603967,4.952794111008254
2021-03-02,5.0665720252761615,4.962709427517431
2021-03-03,5.060320604524602,4.976771697574679
2021-03-04,5.058425499048077,4.990804418719932
2021-03-05,5.055259305726613,5.002961984533309
2021-03-08,5.03342938659036,5.006193198337854
2021-03-09,5.026670075574396,5.012475512916307
2021-03-10,4.9942136892713895,5.00691253826921
2021-03-11,4.990245705231887,5.009119371944976
2021-03-12,5.046417740543864,5.0344532999586935
2021-03-15,5.110745129790247,5.067301316087473
2021-03-16,5.156963814924889,5.097589122447124
2021-03-17,5.172214563701553,5.118310142592714
2021-03-18,5.1800555236182,5.136044102442001
2021-03-19,5.133282109666915,5.131180866625064
2021-03-22,5.172703722455888,5.155498888903329
2021-03-23,5.1705638308350075,5.165450172792204
2021-03-24,5.167631587648804,5.173679572856252
2021-03-25,5.1734607743779195,5.18402121730251
2021-03-26,5.162688316142848,5.187137247740391
2021-03-29,5.163625474321926,5.192995988900706
2021-03-30,5.140955266777915,5.188567136225469
2021-03-31,5.161585083522969,5.198723359862111
2021-04-01,5.188661164953316,5.212585737158482
2021-04-02,5.19709653428,5.2206105692026785
2021-04-06,5.188338549557325,5.221702649210464
2021-04-07,5.195339590176031,5.227613456649602
2021-04-08,5.172298175528544,5.221429966758062
2021-04-09,5.156524581170931,5.2155600636903765
2021-04-12,5.177667426548429,5.222689834149246
2021-04-13,5.178252927891908,5.223076941410587
2021-04-14,5.187538470272367,5.226635837519545
2021-04-15,5.1890290458892245,5.227540801383514
2021-04-16,5.20334631578908,5.233385873096508
2021-04-19,5.22615576172019,5.243560318036824
2021-04-20,5.236294775273405,5.250264537026292
2021-04-21,5.2106236994368,5.243045619532538
2021-04-22,5.179323247218811,5.230911599960373
2021-04-23,5.135770692143948,5.210889224629006
2021-04-26,5.07562470947245,5.180391596476651
2021-04-27,5.01876597518274,5.1462429690896
2021-04-28,4.978512717562055,5.114430709976933
2021-04-29,4.968031562597437,5.092006232556999
2021-04-30,4.9368707865294255,5.061549318220045
2021-05-06,4.932595239572821,5.040450504080771
2021-05-07,4.941734067937477,5.025791295175365
2021-05-10,4.954933830167951,5.01499526239891
2021-05-11,4.974872719166343,5.009419679697258
2021-05-12,4.994256334338039,5.006613091217969
2021-05-13,4.994641193195475,4.998979516093655
2021-05-14,5.004618939711724,4.996193725176993
2021-05-17,5.002725044597385,4.990402154018149
2021-05-18,4.997257494132026,4.983795927687407
2021-05-19,4.971302326198623,4.969230680986916
2021-05-20,4.958979696008629,4.958598126528361
2021-05-21,4.937923562850128,4.9441762006309045
2021-05-24,4.897628060254765,4.92101948288326
2021-05-25,4.921741087711666,4.921081280701422
2021-05-26,4.939154474688777,4.921531978719828
2021-05-27,4.9470432736894665,4.92049538804902
2021-05-28,4.925619622270614,4.909078198517251
2021-05-31,4.907239855322515,4.897646221575359
2021-06-01,4.904722692358322,4.891657095288808
2021-06-02,4.89931901374368,4.884999463642549
2021-06-03,4.887414963002947,4.8759453345285655
2021-06-04,4.884769198439506,4.870239449197865
2021-06-07,4.874759080551567,4.862027763364158
2021-06-08,4.8643391110160135,4.853439224439982
2021-06-09,4.871796843754605,4.851780259415245
2021-06-10,4.863982880933573,4.845303118676596
2021-06-11,4.886553208553412,4.850924025994974
2021-06-15,4.874953411499376,4.8453580264908105
2021-06-16,4.876513590612894,4.844493485853969
2021-06-17,4.855249226619031,4.835043658012776
2021-06-18,4.841442098151132,4.827145883470243
2021-06-21,4.82380808374446,4.816987274063838
2021-06-22,4.803788856078474,4.804858306672174
2021-06-23,4.800473684832158,4.798271415244248
2021-06-24,4.826488361456513,4.803795713528177

Answer: 10.0