This must be the longest BMW X5 in the world, seen somewhere in China’s Zhejiang province. The SUV is extended by at least 5 meters to make a good X5 limousine. The owner even thought about the name, he found just ‘X5’ too small so he called it X55. Much better indeed.
Unfortunately we don’t know much more about the vehicle. Conversion was likely done in China, there are many companies today in the stretching-business. See this Roller for an other example.
Likely based on the X5 4.6i.