Document Format Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 1 | FORM 20-F | tm211761d1_20f.htm | 20-F | 2937071 |
| 2 | EXHIBIT 4.38 | tm211761d1_ex4-38.htm | EX-4.38 | 4816 |
| 3 | EXHIBIT 4.39 | tm211761d1_ex4-39.htm | EX-4.39 | 4583 |
| 4 | EXHIBIT 4.40 | tm211761d1_ex4-40.htm | EX-4.40 | 42085 |
| 5 | EXHIBIT 4.41 | tm211761d1_ex4-41.htm | EX-4.41 | 50039 |
| 6 | EXHIBIT 4.42 | tm211761d1_ex4-42.htm | EX-4.42 | 41093 |
| 7 | EXHIBIT 4.43 | tm211761d1_ex4-43.htm | EX-4.43 | 8985 |
| 8 | EXHIBIT 4.44 | tm211761d1_ex4-44.htm | EX-4.44 | 39958 |
| 9 | EXHIBIT 4.45 | tm211761d1_ex4-45.htm | EX-4.45 | 43902 |
| 10 | EXHIBIT 4.46 | tm211761d1_ex4-46.htm | EX-4.46 | 72542 |
| 11 | EXHIBIT 4.47 | tm211761d1_ex4-47.htm | EX-4.47 | 59733 |
| 12 | EXHIBIT 4.48 | tm211761d1_ex4-48.htm | EX-4.48 | 9159 |
| 13 | EXHIBIT 4.49 | tm211761d1_ex4-49.htm | EX-4.49 | 39173 |
| 14 | EXHIBIT 8.1 | tm211761d1_ex8-1.htm | EX-8.1 | 13122 |
| 15 | EXHIBIT 12.1 | tm211761d1_ex12-1.htm | EX-12.1 | 13347 |
| 16 | EXHIBIT 12.2 | tm211761d1_ex12-2.htm | EX-12.2 | 14335 |
| 17 | EXHIBIT 13.1 | tm211761d1_ex13-1.htm | EX-13.1 | 7236 |
| 18 | EXHIBIT 13.2 | tm211761d1_ex13-2.htm | EX-13.2 | 7812 |
| 25 | GRAPHIC | image_001.gif | GRAPHIC | 1282 |
| 26 | GRAPHIC | image_001.jpg | GRAPHIC | 872 |
| 27 | GRAPHIC | image_002.gif | GRAPHIC | 1153 |
| 28 | GRAPHIC | image_002.jpg | GRAPHIC | 783 |
| 29 | GRAPHIC | image_003.gif | GRAPHIC | 1549 |
| 30 | GRAPHIC | image_003.jpg | GRAPHIC | 842 |
| 31 | GRAPHIC | image_004.gif | GRAPHIC | 1643 |
| 32 | GRAPHIC | image_004.jpg | GRAPHIC | 1209 |
| 33 | GRAPHIC | image_005.gif | GRAPHIC | 343 |
| 34 | GRAPHIC | image_005.jpg | GRAPHIC | 916 |
| 35 | GRAPHIC | image_006.gif | GRAPHIC | 611 |
| 36 | GRAPHIC | image_006.jpg | GRAPHIC | 1112 |
| 37 | GRAPHIC | image_007.gif | GRAPHIC | 1319 |
| 38 | GRAPHIC | image_007.jpg | GRAPHIC | 969 |
| 39 | GRAPHIC | image_008.gif | GRAPHIC | 793 |
| 40 | GRAPHIC | image_008.jpg | GRAPHIC | 1114 |
| 41 | GRAPHIC | image_009.jpg | GRAPHIC | 1099 |
| 42 | GRAPHIC | image_010.jpg | GRAPHIC | 863 |
| 43 | GRAPHIC | image_011.jpg | GRAPHIC | 967 |
| 44 | GRAPHIC | image_012.jpg | GRAPHIC | 1162 |
| 45 | GRAPHIC | image_013.jpg | GRAPHIC | 1086 |
| 46 | GRAPHIC | image_014.jpg | GRAPHIC | 1544 |
| 47 | GRAPHIC | image_015.jpg | GRAPHIC | 1064 |
| 48 | GRAPHIC | image_016.jpg | GRAPHIC | 1442 |
| 49 | GRAPHIC | image_017.jpg | GRAPHIC | 1581 |
| 50 | GRAPHIC | image_018.jpg | GRAPHIC | 1438 |
| 51 | GRAPHIC | image_019.jpg | GRAPHIC | 1253 |
| 52 | GRAPHIC | image_020.jpg | GRAPHIC | 1021 |
| 53 | GRAPHIC | image_021.jpg | GRAPHIC | 867 |
| 54 | GRAPHIC | image_022.jpg | GRAPHIC | 1006 |
| 55 | GRAPHIC | image_023.jpg | GRAPHIC | 1017 |
| 56 | GRAPHIC | image_024.jpg | GRAPHIC | 1366 |
| 57 | GRAPHIC | image_025.jpg | GRAPHIC | 860 |
| 58 | GRAPHIC | image_026.jpg | GRAPHIC | 1003 |
| 59 | GRAPHIC | image_027.jpg | GRAPHIC | 716 |
| 60 | GRAPHIC | image_028.jpg | GRAPHIC | 810 |
| 61 | GRAPHIC | image_029.jpg | GRAPHIC | 968 |
| 62 | GRAPHIC | image_030.jpg | GRAPHIC | 989 |
| 63 | GRAPHIC | image_031.jpg | GRAPHIC | 928 |
| 64 | GRAPHIC | image_032.jpg | GRAPHIC | 912 |
| 65 | GRAPHIC | image_033.jpg | GRAPHIC | 822 |
| 66 | GRAPHIC | tm211761d1_img001.jpg | GRAPHIC | 149479 |
| 67 | GRAPHIC | tm211761d1_img002.jpg | GRAPHIC | 86994 |
| 68 | GRAPHIC | tm211761d1_img003.jpg | GRAPHIC | 133180 |
| 69 | GRAPHIC | tm211761d1_img005.jpg | GRAPHIC | 64149 |
| Complete submission text file | 0001104659-21-048131.txt | 21456859 |
Data Files
| Seq | Description | Document | Type | Size |
|---|---|---|---|---|
| 19 | XBRL INSTANCE DOCUMENT | ambo-20201231.xml | EX-101.INS | 6258497 |
| 20 | XBRL TAXONOMY EXTENSION SCHEMA | ambo-20201231.xsd | EX-101.SCH | 127633 |
| 21 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE | ambo-20201231_cal.xml | EX-101.CAL | 124810 |
| 22 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE | ambo-20201231_def.xml | EX-101.DEF | 485590 |
| 23 | XBRL TAXONOMY EXTENSION LABEL LINKBASE | ambo-20201231_lab.xml | EX-101.LAB | 843665 |
| 24 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE | ambo-20201231_pre.xml | EX-101.PRE | 834997 |
EIN.: 000000000 | State of Incorp.: E9 | Fiscal Year End: 1231
Type: 20-F | Act: 34 | File No.: 001-34824 | Film No.: 21815467
SIC: 8200 Services-Educational Services