At the end of Shang-Chi, Wenwu dies, the Ten Rings pass to Shang-Chi, and Wong summons him and Katy to Kamar-Taj.
The Dweller in Darkness is defeated and Ta Lo survives. Wenwu dies after redeeming himself and leaves the rings to his son. That summons sets up the rings as a mysterious signal that other heroes will have to investigate, and it places Shang-Chi in the wider MCU.
In my opinion, the smartest choice is the order of the two big beats. Shang-Chi spares his father only after he has mastered the rings, so the mercy reads as strength rather than weakness, and Wenwu's sacrifice then answers that mercy. It could be argued that the inheritance feels sudden, since Shang-Chi spent the whole film refusing his father's legacy. Perhaps that is the point: he takes the rings on his own terms, with his sister and his best friend beside him, rather than as a weapon of conquest.
There is also a page to screen angle worth keeping straight. The Ten Rings first surfaced on screen in Iron Man (2008), where a terrorist group of that name captures Tony Stark, and Iron Man 3 later gave us a terrorist called the Mandarin, with Ben Kingsley credited as Trevor Slattery. This film does not erase either of those. It gives the name a family, a leader in Xu Wenwu and a source in the ten rings themselves, and it lets Kingsley's Slattery walk into Ta Lo as part of the rescue party, which is a neat way to fold an older film into a new one.
The ending also works because of how the fights were built. Brad Allan and the Jackie Chan Stunt Team coordinated the action, and the Macau sequences were shot on bluescreen sets with background work by Rodeo FX. The Ta Lo battle, by contrast, plays out in the built village, so the finale feels more grounded and more emotional than the earlier set pieces. That contrast is part of why the father and son confrontation lands.
Compare it with Black Widow (2021), released two months earlier, which also turns on a fractured family and a sibling bond. Both films end by handing a legacy to a younger hero, but Shang-Chi is the one that sends its lead straight to Kamar-Taj with a mystery attached.
The open question is the signal, which the mid credits scene hands to Bruce Banner and Carol Danvers. To see where the saga goes next, the Marvel movies in order page shows the following films, and the Marvel timeline places Shang-Chi in the official order.