[Eromaveabeara]

Stop being a imbecile, and see if you can find any narration that Imam Jaffer (as) had said that he gained any sort of knowledge from Imam Abu Hanifa.

[Leave Shiism for it is extreme deviance, review your faith for it is corrupt.]

Now to answer your question, it is not strange or uncommon for two big scholars who lived in the same era to benefit from each-other's knowledge, we don't need to go out of our way to try and dig up proofs, but your point is that it is "impossible" for Ja'far bin Muhammad to have benefited from abu Hanifa al-Nu'man? why not? was he not a big scholar who had knowledge? why is it "greatly exaggerated"? The theory in your religion is that Ahlul-Bayt knew everything, they inherited knowledge from each-other and did not need anybody else's knowledge, I will answer you by providing some random and quick examples where Ja'far bin Muhammad benefited from the knowledge of men who are not from Ahlul-Bayt.

Sahih Muslim vol.2 pg.49, we read this Sanad:

حَدَّثَنَاه قُتَيْبَةُ، عن حَاتِمِ بن إِسْمَاعِيل، عن جَعْفَر بن مُحَمَّد ، عن مُحَمَّد بن الْمُنْكَدِرِ، عن عَبْدِ اللَّهِ بن حُنَيْنٍ، عن عَلِيّ Quaybah told us, from Hatim bin Isma'eel, from Ja'far bin Muhammad (al-Sadiq), from Muhammad bin al-Munkadiri, from 'Abdullah bin Hunein, from 'Ali bin abi Talib (ra): and he mentions the Hadith where it is forbidden to recite while in Ruku'u.

Comment: al-Sadiq took from the knowledge of two men here, both are not from Ahlul-Bayt and both are famous Imams of Ahlul-Sunnah.

And he had other Shuyoukh such as in this Hadith of Sahih Muslim vol.3 pg.26:

حَدَّثَنَا عَبْدُ اللَّهِ بن مَسَلَمَة بن قَعْنَب، حَدَّثَنَا سُلَيْمَان، يَعْنِي ابن بِلَال ، عن جَعْفَر، وهُوَ بن مُحَمَّد ، عن عَطَاءِ بن أَبِي رَبَاحٍ، أَنَّهُ سَمِعَ عَائِشَةَ، زَوْجَ النَّبِيّ- صَلَّى اللهُ عَلَيْهِ وَسَلَّم - تَقُولُ 'Abdullah bin Maslamah bin Qa'nab told us, Suleiman meaning ibn Bilal told us, from Ja'far (al-Sadiq) and he is the son of Muhammad, from 'Ataa bin abi Rabah, that he heard 'Aisha (ra) the wife of Rassul-Allah (SAWS) say: and she mentions the Hadith about rain being a mercy.

Or in Musnad Ahmad vol.4 pg.332:

حَدَّثَنَا عبد الله حَدَّثَنِي أبي، حَدَّثَنَا مُحَمَّد بن عَبَّادٍ الْمَكِّيُّ، حَدَّثَنَا أبو سَعِيدٍ مَوْلَى بني هَاشِمٍ، حَدَّثَنَا عَبْدُ اللَّهِ بن جَعْفَر، عن أُمِّ بَكْرٍ، وجَعْفَر، عن عُبَيْدِ اللَّهِ بن أَبِي رَافِع، عن الْمِسْوَر قَالَ 'Abdullah told us, my father told me, Muhammad bin 'Abad al-Makki told us, abu Sa'eed the Mawla of bani Hashim told us, 'Abdullah bin Ja'far told us, from Umm Bakr and Ja'far (al-Sadiq), from 'Ubeidullah bin abi Rafi', from al-Miswar that he said: and he mentions a Hadith about Fatima (ra), what makes her happy makes the Prophet (SAWS) happy and what saddens her makes the Prophet (SAWS) sad...

In fact even when Ja'far narrates from his father Muhammad, who was a known scholar of Madinah, (He narrated from his father A LOT) as we know al-Baqir did not meet the Prophet (SAWS) so he would narrate from Jabir bin 'Abdullah (ra), such as in Sahih Muslim vol.3 pg.11:

حَدَّثَنَا أبو بَكْرِ بن أَبِي شَيْبَةَ، حَدَّثَنَا ، وكِيعٌ، عن سُفْيَانَ، عن جَعْفَر، عن أَبِيهِ، عن جَابِر قَالَ Abu Bakr bin abi Shaybah told us, Wakee' told us, from Suffian, from Ja'far (al-Sadiq), from his father (al-Baqir), from Jabir (ra) that he said: and he mentions the Hadith of what the Prophet (SAWS) used to say at the beginning of his Sermons.

Muhammad bin 'Ali Zain al-'Abideen would also narrate from others such as Yazid bin Hurmouz and 'Ubeidullah bin abi Rafi' and abu Sa'eed al-Khudari ect... but this is not our topic.

And if you want some of those "golden chains" that you people keep talking about, where Ahlul-Bayt narrate from each-other until they reach the Prophet (SAWS), then rest assured we have the proper ones and not the fabricated ones such as in the books of the Rafidhah, an example from Sunan al-Nasai vol.4 pg.47:

أَخْبَرَنَا إِبْرَاهِيم بن هَارُون الْبَلْخِيُّ قَالَ، حَدَّثَنَا حَاتِمٌ، عن جَعْفَر بن مُحَمَّد ، عن أَبِيهِ: أن الْحَسَنَ بن عَلِيّ كَانَ جَالِسًا فَمُرَّ عَلَيْهِ بِجَنَازَةٍ فَقَامَ النَّاسُ، حَتَّى جَاوَزَتِ الْجَنَازَةُ فَقَالَ الْحَسَنُ Ibahim bin Haroon al-Balkhi told us, he said: Hatim told us, from Ja'far bin Muhammad (al-Sadiq), from his father (al-Baqir): that al-Hassan bin 'Ali (ra) was sitting when...

I hope you have an idea now, this is why it is in no way "greatly exaggerated" if we say that both benefited from each-other...

Salam 'Aleykum,