I guess I didn't detail my issues with the DB/DP abbreviations in this thread, so bear with me
I don't dispute that China has had arms deals with Pakistan and Bangladesh. China's arms exporting approach seems to be: sell to whoever will buy. Therefore, even though these two South Asian countries have not been on friendly terms before, during or since the horrific 1971 war that broke up predominantly Hindu Bangladesh (formerly East Pakistan) from predominantly Muslim West Pakistan, now simply Pakistan, I wouldn't be the least bit surprised that China sold Type 56 SKSs to both countries, even in the early 70's when the wounds were fresh.
My issue is with the widely accepted meaning for DB and DP, and as I understand it, these meanings are what has led to the widely accepted belief that these were supposed to go to Bangladesh and Pakistan, although these of course came to the US from China, not those two countries. If the DB and DP interpretations followed after some other evidence that China specifically exported these SKSs to Bangladesh and Pakistan, then I missed that and would be very interested in that information.
From Google Translate we have:
English: DB, Destination Bangladesh
Chinese: 孟加拉目的地
Pinyin: Mèngjiālā mùdì de
Bengali: গন্তব্য বাংলাদেশ
Bengali transliteration: Gantabya Bānlādēśa
English: DP, Destination Pakistan
Chinese: 目標巴基斯坦
Pinyin: Mùbiāo Bājīsītǎn
Urdu: منزل پاکستان
There is no transliteration available for Urdu but Arabic is: Alwijhat Bakistan
So, what has been widely accepted is that these SKSs have an English abbreviation for arms that were produced by China and supposedly some of which were exported to Bangladesh or Pakistan, where English is not the official language for any of the three parties and the translations in the official languages do not give DB or DP as logical abbreviations.
I know I'm in the minority in questioning the "Destination Pakistan/Bangladesh hypothesis", that's okay
My alternative hypothesis of D = Dōngběi = Northeast (China), one of their names for these three provinces, is also a bit weak, since I can't explain the meaning of B or P, but I still think it's more likely than the Pakistan/Bangladesh hypothesis.
Okay, that's my two yuan on the subject