The Three-Year Agreement is the promised duel between Xiao Yan and Nalan Yanran after she publicly attempts to cancel their arranged engagement. Xiao Yan accepts that she should control her marriage, but rejects the humiliating method and the power imbalance created by Misty Cloud Sect backing. The three-year deadline allows both characters to train before a public confrontation. Xiao Yan's victory proves his recovery, but the arc also exposes a larger conflict between personal autonomy, family dignity and institutional authority.
Xiao Yan and Nalan Yanran before the duel
The conflict becomes clearer when autonomy, method, resources and institutional backing are compared separately.
| Question | Xiao Yan | Nalan Yanran |
|---|---|---|
| Position at the broken engagement | Publicly weakened former prodigy | Gifted disciple backed by a powerful sect |
| What each wants | Dignity and the right not to be treated as disposable | Freedom from an arranged marriage |
| Source of support | Yao Lao, training, alchemy and accumulated experience | Yun Yun's mentorship and Misty Cloud Sect resources |
| Primary combat identity | Heavy Xuan Ruler, flame techniques and adaptive strategy | Sect-trained wind sword techniques and formal discipline |
| What the duel tests | Whether his recovery is real and self-directed | Whether talent and sect backing justify the original public method |
| What the outcome cannot settle | Every later conflict with the Misty Cloud Sect | All questions of autonomy, regret and institutional responsibility |
People, institution and weapon connected to the agreement
Each relationship describes what the story establishes, without treating proximity as identity or romance.
Xiao Yan萧炎
Protagonist, alchemist and Heavenly Flame wielderHis recovery and progression connect every major early character, cultivation system and story event in this cluster.
PersonNalan Yanran纳兰嫣然
Misty Cloud Sect disciple and early rivalHer public attempt to end an arranged engagement creates the Three-Year Agreement and its institutional consequences.
PersonYun Yun云韵
Misty Cloud Sect leader and wind cultivatorHer personal connection to Xiao Yan conflicts with her responsibility for the sect involved in the Three-Year Agreement.
PersonYao Lao药老
Xiao Yan's mentor and alchemy teacherHe turns Xiao Yan's apparent decline into a disciplined path built on training, alchemy and strategic judgment.
OrganizationMisty Cloud Sect云岚宗
Major Jia Ma Empire sectIts backing turns a dispute between two young cultivators into a public test of institutional authority.
ThingHeavy Xuan Ruler玄重尺
Signature weapon and training toolThe ruler makes Xiao Yan's physical training and close-range combat identity visually recognizable.
EventThree-Year Agreement三年之约
Public duel and early turning pointThe agreement gives Xiao Yan and Nalan Yanran three years to turn a broken engagement into a formal confrontation.
The broken engagement creates two valid claims
Nalan Yanran does not want an arranged marriage to determine her future. That desire for autonomy is legitimate. Xiao Yan does not demand that she love or marry him, but he refuses to accept being publicly treated as an object whose value disappeared with his cultivation.
The conflict becomes powerful because both characters possess a valid human concern. The injury comes from method and power. Nalan Yanran arrives with Misty Cloud Sect authority behind her, while Xiao Yan and the Xiao Clan must respond under public pressure.
Why Xiao Yan asks for three years
An immediate fight would prove little. Xiao Yan is still trapped in the stage of unexplained decline, and Nalan Yanran has training, status and institutional support. The three-year period creates a test in which time, discipline and choices can change the conditions.
The deadline gives Xiao Yan's early story a clear structure. Every training decision, alchemy breakthrough, technique and dangerous journey can be measured against the promise to stand before the Misty Cloud Sect under his own power.
Yao Lao and the Heavy Xuan Ruler
Yao Lao provides the knowledge that makes the agreement achievable, but he does not simply hand Xiao Yan a final victory. Training with the Heavy Xuan Ruler develops the body under restriction, while alchemy and combat instruction build a broader system of survival.
The ruler becomes important visual shorthand because it represents those years of accumulated difficulty. When Xiao Yan carries it into a public confrontation, the weapon links the duel to the private work that occurred before anyone believed in his recovery.

Nalan Yanran is more than an obstacle
Nalan Yanran also trains during the three years. She is Yun Yun's disciple and represents the discipline and resources of the Misty Cloud Sect. Reducing her to an arrogant fiancee removes the fact that she is a cultivator attempting to define her own life inside another hierarchy.
Her error lies not in wanting freedom, but in using public humiliation and unequal backing to obtain it. The duel forces her to confront the person hidden behind the reputation of a failed prodigy and the consequences of assuming his future was already decided.
The Misty Cloud Sect changes the scale
If Xiao Yan and Nalan Yanran met privately, the dispute could remain between two families. The Misty Cloud Sect makes it institutional. Its reputation, elders, disciples and control of the setting shape how the result will be interpreted.
This is why the agreement does not end when one fighter falls. A public institution must decide whether it can accept an outcome that damages its authority. The response reveals whether rules and honor matter more than preserving face.
What Xiao Yan's victory proves
Xiao Yan's victory proves that the decline did not define his ceiling. He has rebuilt cultivation, learned to use flame and weapon systems, gained experience outside clan protection and developed the judgment to fight a formally trained rival.
The result does not mean he was entitled to the marriage. It means Nalan Yanran and the sect were wrong to treat him as permanently worthless and safe to humiliate. Separating those claims makes the arc more coherent for global readers.
A practical timeline of the agreement
The sequence begins with the engagement cancellation at the Xiao Clan, where personal autonomy is pursued through a public demand backed by sect status. Xiao Yan responds by rejecting the humiliation and setting a three-year deadline rather than pretending he can win immediately.
The middle of the timeline is distributed across training and travel. Xiao Yan meets Yao Lao as a true teacher, develops alchemy, carries the Heavy Xuan Ruler, gains battle experience and encounters powers and relationships outside the clan. Nalan Yanran continues formal cultivation under Yun Yun and the Misty Cloud Sect.
The public duel is therefore the convergence of two different development systems. One is mobile, improvised and built through repeated survival problems. The other is institutional, disciplined and supported by an established sect. The outcome compares more than two techniques; it compares what the previous three years have made each person capable of doing.
Why winning the duel does not end the crisis
A formal contest can determine who wins under stated conditions, but it cannot force an institution to respond with integrity. Xiao Yan's victory damages Misty Cloud Sect prestige, and the treatment he receives afterward reveals how quickly formal honor can give way to the protection of status.
This distinction prevents the arc from ending as a simple score update. The promised duel is resolved, but earlier choices, sect intervention and wider hostility continue to produce consequences. Xiao Yan must still think about survival beyond the arena.
For Nalan Yanran, defeat also creates a future beyond the role of unbeatable sect disciple. The result does not erase her autonomy; it demonstrates that autonomy does not remove accountability for the manner in which power was used against another family.
Yun Yun stands between personal recognition and sect duty
Yun Yun knows Xiao Yan through circumstances that are not identical to his public identity at the sect. She also teaches Nalan Yanran and leads the institution whose authority surrounds the duel. Those relationships place her in a conflict where personal knowledge does not automatically translate into political freedom.
Her role shows why character relationships in Battle Through the Heavens cannot be mapped as simple allies and enemies. A person can care for someone while remaining responsible for an institution acting against him.

Common misunderstandings about the arc
One common summary says Nalan Yanran is wrong simply because she rejects Xiao Yan. That misses the story's stronger distinction: she has the right to reject an arranged marriage, but the public demand and institutional pressure make the method harmful. Another summary treats Xiao Yan's victory as proof that he deserved to possess her, which the actual conflict does not require.
A second misunderstanding is that Yun Yun can freely solve the problem because she leads the sect. Leadership creates responsibility, but it also places her inside elders, traditions and prestige concerns that shape what actions are politically possible. Her personal bond with Xiao Yan increases the conflict rather than eliminating it.
A third mistake is to label every Xiao Yan battle image as the Three-Year Agreement. The event requires character, opponent, sect setting or reliable source context. A blue flame and Heavy Xuan Ruler can support Xiao Yan identity while remaining insufficient to identify the exact duel.
Novel source and donghua presentation
The Qidian novel anchors the event, character names and source continuity. The donghua gives the agreement a visual language through character models, sect architecture, weapon animation, wind techniques and flame effects. Pacing and emphasis may differ without changing the basic relationship network.
XianLore separates source facts from visual evidence. An article can explain the event through the original work while an image caption states whether a visual is an official animation frame, promotional image or reviewed fan interpretation. This avoids using the authority of the novel to authenticate an unrelated wallpaper.
For international readers, the same rule applies to translations. Three-Year Agreement, Three-Year Promise and Three-Year Appointment can remain search aliases under one canonical event. Creating separate pages for each phrase would divide authority and make the story appear more complicated than it is.
Why the arc is not just revenge
Revenge is part of Xiao Yan's motivation, but the agreement lasts because it connects several larger themes: who controls marriage, how status changes respect, whether institutions accept defeat and what disciplined recovery can prove in public.
For XianLore, the event page connects two characters, one teacher, one sect, one weapon and a sequence of reviewed images. That entity structure lets a reader move from the duel to the reasons behind it instead of receiving a disconnected fight summary.
Sources used for this guide
Qidian's official publication page anchors the original work, its Chinese title and source continuity. English names can vary across subtitles and translations, so XianLore keeps Chinese names and search aliases attached to each entity.
斗破苍穹Qidian · Official source-novel publicationXiao Yan FAQ
What is the Three-Year Agreement in Battle Through the Heavens?
It is the promised duel between Xiao Yan and Nalan Yanran, scheduled three years after the public cancellation of their arranged engagement.
Why did Nalan Yanran cancel the engagement?
She wanted control over an arranged marriage. The story's conflict comes largely from the public method, the humiliation of Xiao Yan's family and the unequal sect power behind the demand.
Who wins Xiao Yan vs Nalan Yanran?
Xiao Yan wins the formal duel, demonstrating that his recovery and years of training are real.
Is Nalan Yanran evil?
No. She is an early rival whose pursuit of autonomy is understandable, while the way she uses sect backing to impose the decision causes serious harm and consequences.
What is Yun Yun's role in the Three-Year Agreement?
Yun Yun is Nalan Yanran's teacher and the leader of the Misty Cloud Sect. Her position makes the conflict personally difficult and institutionally significant.
Does the duel end the Misty Cloud Sect conflict?
No. It resolves the promised contest but does not erase wider tensions involving sect authority, earlier actions and the treatment of Xiao Yan after the result.

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