Had he been born in our era, Li Bai (701–762) would have surely been a rock star, wrecking hotel rooms and bedding groupies he met on a drug-fuelled stage-dive. In Tang dynasty China, he still enjoyed a reputation as a wild-child poet, lionised for his quick couplets and witty juxtapositions, summoned even to the Xuanzong Emperor’s entourage.

That was when he blew it. After dithering for days among a crowd of hangers-on, he got his moment to shine, called in as a script doctor on a court performance that needed punching up. Instead, he drunkenly tried flattering a prickly consort. With all the self-destructive tendencies of a heavy-metal frontman, Li Bai dissed the chief eunuch and back-handedly complimented the famously plump Yang Guifei for being as gracile as a legendary stick-thin kingdom-wrecker. It took a while for courtiers to unpick his cheeky insults, but his career at court was essentially over before it had begun.

In his new book, The Banished Immortal, poet and novelist Ha Jin offers a slick and readable biography of China’s most famous poet – his wives and concubines, his dissolute life, and his flirtations with power and politics. It’s a warts-and-all portrayal that both evokes Li Bai’s talent and his ghastly, narcissistic disregard for others. “So long as the host can get me drunk,” he slurs in one epigram, “I’ll have no idea where my hometown is.” We’ve all got a friend like Li Bai… we just wish he’d warn us before he rings the doorbell and asks if we’ve got any booze.

Heaven is high and the Emperor is far away – one gets a strong sense with Jin’s text of the sheer, daunting size of China. A man of privilege who never seems to have to really work, Li Bai’s travels separate him from his wife for years on end, and he only writes to her on a couple of occasions. Her own letters never find him, defeated by the sheer length of lines of communication. In one amusing incident fit to fill an entire episode of Star Trek, a communiqué arrives from a people so remote that nobody at court understands it. Only Li Bai, who grew up in western China and may even have been born in what is now Kyrgyzstan, can decipher it, and reveals that it is a declaration of war.

Jin is at his best when dealing with Li Bai as a fellow creative – he makes no boast to be his equal, but has an informed insider’s grasp of the perils of poetry. He is not afraid to point out those places where his subject is just phoning it in, and is ready to suggest when certain “off-the-cuff” couplets have been composed in advance. This poet’s-eye view of another poet is Jin’s greatest contribution, cutting through the hagiographies and unmitigated praise of other authors to the heart of Li Bai’s true talent. The author, an exile who has spent much of his adult life in America, clearly identifies with the peripatetic Li Bai, excluded from high office and ever unsure of his situation, “a fish trapped in a roadside puddle, dreaming of returning to the ocean.”

Jin makes a strong case for Li Bai as a man of letters ousted from what might have been a more productive calling, an alcoholic genius who inevitably puts a foot wrong in the Tang court, and a late-life careerist who disastrously backs the wrong horse. We share in Li Bai’s elation when he hears that the new emperor, Suzong, has pardoned him, and in his disappointment when he tardily realises this was not a recognition of his eloquence, but a blanket amnesty. Jin digs down into the hidden messages of love poems, and the subtle asides contained in what first appear to be fawning songs of praise.

There are, nevertheless, some odd missteps in the prose. Jin writes at one point of the “Nan dynasty”, which never existed – any Chinese speaker can see that he is referring to the “Southern Dynasties”, but this error has been allowed to stand. The Xianbei tribe is archaically referred to as the Sien-pi. Jin bafflingly recounts the death of the concubine Yang Guifei as suicide, when most accounts agree that she was strangled. In what I can only assume is a sop to the American market, Jin praises the work of Ezra Pound, who spoke no Chinese and left scraps of Japanese gibberish in his “translations” from where he copied out a crib sheet. He guardedly acknowledges the earlier work of Arthur Waley, conceding that while dated, it still has weight – I would suggest that many of Waley’s translations retain a majesty and harmony that is often lacking here. But this is not Ha Jin’s fault – all but truly bilingual translators usually work into their native language, not out of it.

For the reader unfamiliar with Chinese, Jin’s explanations can open whole new worlds between the lines, although sometimes only patchily. He notes, for example, the allusion in the last line of the poem “Zhan Chengnan” to an epigram from the Dao De Jing, but omits to mention that the opening lines are obviously a nod to “We Fought South of the City Wall”, a famous protest song from the Han dynasty. When examining “A Lament of the Leaving Woman,” Jin interprets it as a poem that reaches out to Li Bai’s disenchanted live-in lover. But considering the hostility with which other poems rail against “that stupid woman,” it is surely more likely that this poem is a toxic masterpiece of passive-aggression, taunting her for losing her looks and having nowhere else to go, a “cheap concubine.” Jin flinches at pointing out just how good his subject was at being bad.

However, these are discussions to be had, rather than outright statements of incontrovertible fact. Jin has consulted a number of Chinese-language books on Li Bai, and his text valuably distils much of their arguments for an Anglophone audience. While he often quotes trenchant third-party observations, beyond his intuitions as a jobbing poet, he rarely gives evidence of a source-critical reading of these other authors – he is insightful on Li Bai’s poetry, but hands-off regarding his historicity. Repeatedly, he refers to these other works as if they are a unanimous chorus of approval, whereas a more historically minded author might have tried a little forensics to make sure these other sources weren’t largely citing each other.

Regardless, the field of popular biographies of medieval Chinese figures is shockingly small. Li Bai’s life spanned a rich, transformative period in the 8th century, the height of the Silk Road and the brief florescence of a truly diverse China. Ha Jin’s biography will introduce this poet to a whole new generation, suffused with examples of his philosophy and verse.

Jonathan Clements is the author of A Brief History of China.