LOL, I noticed a few S. reticulata subspecies with the common name of "Pekin Lilac" and I thought it was a misspelling of Peking. One variety is spelled "Peking" while the others are "Pekin":
https://garden.org/plants/sear... but it's apparently spelled both ways.
People sometimes stick the exact same common name on plants that come from entirely different parts of the world; plants that have totally different care and culture requirements. Common names may not be "wrong" but they can be extremely confusing, especially for those new to gardening.