Pyaray Sunni bacho suno kahani - Nu mān ibn Thābit ibn Zū ā ibn Marzubān[4] (Persian:ʿ ṭ بن ثابت بن نعمانمرزبان بن زوطا ), better known as Imām Abū anīfah, (699 — 767 CE / 80 — 148 AH) was the founder of Ḥ

the Sunni Hanafi school of fiqh (Islamic jurisprudence). Courtesy Wikipedia and you can recheck from many sources --- this means Sunni school of thought came into being atleast 100 years after Nabi Pak SallaAllahu alaihi wa Aalihi wa sallam --- so where were you guys for 100 years --- now secondly Imam Abu hanifa was not a sahabi and he was not an Arab even ---- and now finally Shias take ahadith, fiqh and masail e deeni from Prophet Mohammad through Ali and Imam Ali was first Imam and then his son Imam Hassan then Imam Hussain then his son Imam Sajjad then Imam Mohammad Baqir then Imam Jafar Sadaq and this continues to 12 imams all one family starting from Imam Ali Alaihi Salam ---- Imam Ali was sahabi also and Aal e Nabi also so in much better position to convey us Islamic teachings and which went on transferring from Imam Ali to his son till Imam Jaffar Sadaq Alaihi Salam and Imam Jafar sadaq was born in 80 AH also -- so Imam Abu Hanifa and Imam Jafar Sadaq came at same time --- when Imam Jafar sadaq resided in Madinah Shareef and gave Jaffariya (Shia) school of thought at the same time Imam Abu Hanifa resided in Kufa and Shaam under patronage of Banu Umayya and gave people a form of Islam known as Sunni Islam, now that Sunis regard their Hadith books and Hadeeth narrators to be true and accurate and hence Sahih so do Shias also regard their Hadeeths as Sahih, it all depends on which source you are relying upon to be most authentic --- read first everything and recheck then discuss