| Unicode版本 | 最終碼位範圍[a] | 碼位數 | L2 ID | WG2 ID | 檔案 | 
| 3.0 | U+31A0..31B7 | 24 | L2/98-090 | N1713R (頁面存檔備份,存於互聯網檔案館) | Proposal to add 24 extended Bopomofo and 2 modifier letters for Minnan and Hakka, 1998-03-19 | 
| L2/98-158 |  | Aliprand, Joan; Winkler, Arnold, Bopomofo Extensions, Draft Minutes – UTC #76 & NCITS Subgroup L2 #173 joint meeting, Tredyffrin, Pennsylvania, April 20-22, 1998, 1998-05-26 | 
| L2/98-286 | N1703 (頁面存檔備份,存於互聯網檔案館) | Umamaheswaran, V. S.; Ksar, Mike, 8.25, Unconfirmed Meeting Minutes, WG 2 Meeting #34, Redmond, WA, USA; 1998-03-16--20, 1998-07-02 | 
| L2/98-321 | N1905 (頁面存檔備份,存於互聯網檔案館) | Revised text of 10646-1/FPDAM 23, AMENDMENT 23: Bopomofo Extended and other characters, 1998-10-22 | 
| L2/18-255 | N4980 (頁面存檔備份,存於互聯網檔案館) | Tung, Bobby; Ko, But; Wei, Selena, Proposal to Fix Glyphs in Bopomofo Extended Block and Encode one Bopomofo Letter, 2018-06-13 | 
| 6.0 | U+31B8..31BA | 3 | L2/09-049 | N3570 (頁面存檔備份,存於互聯網檔案館) | West, Andrew, Proposal to encode three Bopomofo letters for Hmu and Ge, 2009-01-25 | 
| L2/09-003R |  | Moore, Lisa, B.15.15, UTC #118 / L2 #215 Minutes, 2009-02-12 | 
| L2/09-234 | N3603 (pdf, doc (頁面存檔備份,存於互聯網檔案館)) | Umamaheswaran, V. S., M54.13f, Unconfirmed minutes of WG 2 meeting 54, 2009-07-08 | 
| 13.0 | U+31BB | 1 | L2/18-255 | N4980 (頁面存檔備份,存於互聯網檔案館) | Tung, Bobby; Ko, But; Wei, Selena, Proposal to Fix Glyphs in Bopomofo Extended Block and Encode one Bopomofo Letter, 2018-06-13 | 
| L2/18-183 |  | Moore, Lisa, C.21, UTC #156 Minutes, 2018-11-20 | 
|  | N5020 (pdf, doc (頁面存檔備份,存於互聯網檔案館)) | Umamaheswaran, V. S., 10.3.16, Unconfirmed minutes of WG 2 meeting 67, 2019-01-11 | 
| U+31BC..31BF | 4 | L2/19-100 |  | Chan, Eiso, Preliminary proposal to encode four extended Bopomofo letters for Cantonese, 2019-04-08 | 
| L2/19-173 |  | Anderson, Deborah;  et al, 18, Recommendations to UTC #159 April-May 2019 on Script Proposals, 2019-04-29 | 
| L2/19-177R | N5052 (頁面存檔備份,存於互聯網檔案館) | Yang, Ben; Chan, Eiso, Proposal to encode Cantonese Bopomofo Characters, 2019-05-02 | 
| L2/19-122 |  | Moore, Lisa, Consensus 159-C21, UTC #159 Minutes, 2019-05-08 | 
|  | N5122 (頁面存檔備份,存於互聯網檔案館) | M68.10 and M68.19, Unconfirmed minutes of WG 2 meeting 68, 2019-12-31 | 
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