Starring: Awkwafina, Tzi Ma, Diana Lin, Zhao Shuzhen, Lu Hong, Jiang Yongbo, Jim Liu, ines Laimins Director: Lulu Wang

“THE Farewell,” a touching albeit slight Chinese family dramedy, is “based on an actual lie,” we are told in the film’s first frame. Before we even learn what that means, the main characters are immediately telling untruths: as Billi (Awkwafina from “Crazy Rich Asians”) walks through the frigid streets of her adopted home of New York City, she’s speaking on the phone to her beloved grandmother Nainai back in China. Billi tells her she’s wearing a hat when she’s not; Nainai tells her she’s at her sister’s house when she’s not. And so the lies begin, indicates Chinese-American writer-director Lulu Wang in this earnest, endearing story adapted from her own life.

In her second feature film, Wang (“Posthumous”) wrings moments of stirring emotional truth from her sympathetic ensemble cast, including TV actress Zhao Shuzhen as Nainai and veteran Tzi Ma (“Arrival”) as Billi’s father, but ultimately the film doesn’t have the narrative drive or depth of character to be a commercial vehicle for rising star Awkwafina. There are even a few scenes of screwball antics at a banquet celebration, but “The Farewell” isn’t similar to — and shouldn’t be compared to — “Crazy Rich Asians.”

What “The Farewell” does have is a wonderful conceit at its core, rich with opportunities for pathos, humor and marketing. When Nainai’s family discovers that she has terminal cancer, they decide it’s better not to tell her. And they will do everything in their power to keep her blissfully ignorant of the dire prognosis. Back in New York, Billi resists the idea, but her mother (Diana Lin) counters, “There’s an old Chinese saying: When people get cancer, they die.”

In order to bring the family together around Nainai one last time, they arrange for a quasi-fake wedding for one of her grandchildren in her home of Changchun. All of this falls hard on Billi, and her parents are worried that she’s too close to Nainai to conceal the truth. But she travels to China and joins the family anyway, doing her best to keep up pretences and plaster a fake smile across her face.

The film’s early scenes in China are full of warmth, the relatable dialogue of long-standing relationships (Nainai tells Billi affectionately, “I love to touch your round butt”), and the awkward weight of the family’s charade weighing on their collective shoulders. At their first reunion meal, Billi’s cousin, the makeshift groom-to-be, can barely hold it together, steadfastly holding back the tears. Billi, for her part, also struggles to remains steely, despite her profound love for her grandmother.

No longer the nutty best friend, Awkwafina, in her first starring role, offers a more serious side to her comic persona. Her slouching gait and on-screen naturalness gives the character of Billi an effortless appeal.

But the main problem with the film is that the script, while excellent at capturing single moments, doesn’t give her enough to mentally or physically wrestle with. The second act lags. And while Billi breaks down once, delivering a teary monologue about leaving China as a child, “The Farewell” is so fixated on its principle problem that it doesn’t allow its story or its characters to veer from it, or find further complexities in it. There’s only so many scenes a story can take of family members trying to keep the truth from grandma before it becomes less compelling.

That being said, anyone with a bossy, loving Nainai will find themselves succumbing to the movie’s occasional charms.

Indeed, Wang is a filmmaker to watch, whose serio-comic and delicate sense of the human condition will take her far with audiences. There are singular moments of staging and direction that are skillful: shots such as Billi speaking to her grandmother about her romantic prospects in a wedding photography studio as bride-and-groom are stumbling in the reflection of a mirror behind them. Or the way in which the whole family is seen walking slow-motion towards the camera in a clearly defined instance of indictment, exposing them as some kind of gang of complicit conspirators.

“The Farewell” also briefly touches on the identity politics facing first and second-generation Chinese immigrants and what it means for Chinese to leave for America and become American. It’s a heartfelt and well-meaning film, ripe for our diverse times, but it’s unlikely to be a breakout hit along the lines of “The Big Sick.”

The movie is now being screened in Shenzhen. (SD-Agencies)