Generation

The latest concept of generation came in aftermath of Huang-Mo Wars.
A generation is defined as a span of 9,000 years. to stay in current generation a person has to complete "checkpoints" which are as follows:
* Reach immortal realm before 100 years of age.
* Reach Dao Immortal realm before 9,000 years of age.
Note: You can exceed your generation by clearing next checkpoint before limit of current checkpoint. For example becoming Dao Immortal before 100 years of age. 
A member of current generation is considered a "Junior" and anyone who couldn't keep up with it is considered a "Senior". A junior is expected to saw respect for their seniors and a senior is expected to not involve themselves in matters of juniors, if there is a feud between a junior and senior it is senior who is expected to saw understanding and let the matter not escalate.
Since becoming Immortal in 100 years takes very good fortune and a good amount of resources a normal person, even in a great world like Eastern Azure, can't stay in their generation. This results in advantage to those who has more resources and backing.
There are exceptions to this rule like Young Sovereign Competition.