佢淨係掛住埋頭苦讀，唔同外界接觸，寫出嚟嘅論文恐怕都係「閉門造車」，同現實社會脱節。
He just wants to immerse himself in hard reading, not to contact the outside world, and the papers he writes are probably "behind closed doors", out of touch with the real society.