I'm not familiar with a specific reference to 洛阳伦敦金 (Luoyang London Gold)、Could you provide more context or clarify what you are referring to?

Luoyang is a city in China, and London Gold might refer to gold trading or a gold market、However, without more information, it's difficult to provide a specific answer.

Here are a few possibilities:

1、Gold trading in Luoyang: Luoyang, like many major cities in China, likely has a gold market or trading activities、China is one of the world's largest gold markets, and many cities have a significant presence of gold trading.

2、London Gold Fixing: Historically, London was a major center for gold trading, and the London Gold Fixing was a benchmark for gold prices、However, this was formally replaced by the LBMA Gold Price in 2015.

3、Cultural or tourism reference: There might be a specific cultural event, festival, or attraction in Luoyang related to gold that I'm not aware of.

If you could provide more details or clarify your question, I'd be happy to try and assist you further!