What are front-culm seedlings and back-culm seedlings in orchid terminology? A short story that explains the relationship clearly

A novice orchid grower asked Haoshe Farmer, saying that in orchid books they often come across unfamiliar terms, for example:front long (ridge) seedlings and back long seedlings, and they just cannot figure out what they mean. They asked some so-called experts for explanations, but were still very confused.

Haoshe Farmer first tells everyone a story. There was a man named Old Zhang. His family was not well off when he was young, he built everything from nothing, and by middle age he had earned a bit of property. At that time he married and had a son. He gave most of his property to his son. His son Zhang Er had never suffered the hardships Old Zhang had when he was young, so his health was better than Old Zhang's. After some years, Zhang Er also married and had a child. When the grandson Zhang San was born, the family circumstances were even better than before, and Zhang San grew taller and stronger than both his father and his grandfather.

Things always develop forward. Zhang San is what we often see in books called a "front long seedling." He is stronger and better looking than the previous two generations. His starting point in life was much higher than the previous two generations, and with this material foundation Zhang San's career also went smoothly. Haoshe Farmer previously posted a photo: a first-generation seedling of wild Huilan (Cymbidium faberi) has only 4 leaves, while by the third-generation seedling it can grow to 8 leaves. This is the same principle.

After some years, Old Zhang met a second spring, met a woman he liked, and despite the opposition of his son and grandson, resolutely started a family with that woman. But by this time all his property was already controlled by his son and grandson, and because he was old he could not earn much money anymore. But after all, Old Zhang was someone who had endured hardship, and no difficulty could stop him. He actually managed, under difficult conditions, to have another son. When this son was born, the family circumstances were not promising, and even the most basic nutrition could not be kept up. This son's name was "back long seedling."

Of course, if managed well, given time, it is not impossible for the son of a concubine to surpass the son of the legal wife, or for the back ridge to catch up with and overtake the front ridge.

Dear friends, what do you think of explaining front long seedlings and back long seedlings this way? I do not know whether it will help you in growing orchids in the future. If anything is inappropriate, please point it out.