On the north side and lower flank of the Bear Ear Mountain in Luoyang there is an old stupa. This is Bodhidharma´s burial stupa. 
Some 100 meters away from the stupa is a Temple known as Kong Xiang (literally means ’empty appearance’ but also ’empty chamber’ ). 
Between the front gate and the distant hall you find four stone monuments sticking out from the ground. One of them (the 1st one) is a copy of a memorial stele purportedly composed by Emperor Wu to commemorate Bodhidharma´s supposed saha-death.
Its an impressive text, and one that surely is worth the attention of every good zennist with a sharp eye for the true bodhi (spiritual)-light of Mahayana.
Two more monuments of this memory steele with nearly the same text exists; one located at Yuanfu Temple in North China and one at Shaolin Temple. In them, Emperor Wu praises Bodhidharma and expresses regret that he didn´t understand his message while making all sort of exclamations, further extolling the old Zen-sage in traditional Chinese manners.
By the way, the Yuanfu temple  is where the second patriarch Huike is buried and today the burial pagoda is visited by many westerners paying homage to this most known disciple of Bodhidharma .
The beginning part of the ext reads as follows;
” I have heard, that within the blue sea, there is a Black Dragon with a lustrous white pearl, and that neither gods nor men have ever seen it. But my teacher has done so , the great teacher Bodhidharma. He is said to have come from India, though his home is unknown. We don´t know his family name. This great teacher took mind to be the essence and the yin and yang as the device. His nature was provided by heaven and his wisdom given by gods. His bearing was like the sea and the mountains, his spirit like billowing clouds. He possessed Udana-like clarity, with profound learning like Dharmaruci. The entire Buddhist canon was within his mind-stream. The five skandhas are transported on the sea of words. Riches turn to dust, and golden speech [scriptures] fall short. Vowing to spread the Dharma, he came east from India, planting his staff in China. He expounded the wordless truth , like a bright candle in a dark room, like the bright moon when clouds open.
Further down the memorial stele we read:
Heaven is vast and blue. Wild beasts cry out. Sweet springs gush forth! Another cry! Non-action arrives, and all action is gone, the Way is manifested, and birth and death are exposed. Bodhidharma died on the fifth day of the twelfth month in the early morning hours at Yu Gate. His age was unknown. He was buried ceremoniously at Bear Ear Mountain. His disciples were grief-stricken. Their lamentation moved heaven and earth, and their tears drenched their bodies. They were overcome, mourning as though their fathers and mothers had died. All the disciples, eyes closed mourned in this manner.
Further down the memorial stele we read:
Though his body was interred there ina grave, his appearance  traveled to the western regions. It was as if he came but did not come, left but did not leave. None known as holy or wise have attained Bodhidharma´s wisdom. My imperial actions lack merit and only comprise unworthy karma. Above this karma has harmed heaven´s yin and yang. Below it has damaged the happiness of all beings. At night I am greatly troubled and unable to eat. Within all that are great functions, there is Buddhism´s Mind. Though I have not gained the merit of nine years of sitting meditation to benefit beings, I still seek the meaning of Dharma, this eternal and miraculous gate. Practised in peace it is the essence, the sublime. Those who transmit it by word and deed are the Great Teacher´s progeny. Alas! I saw him and didn´t see him! . I have only regret and distress aboutthe past and present. Though I am an ordinary person, I dare take the role of teacher and say that which I have not attained in this life will create tthe conditions for my future rebirth. One cannot engrave mind onto a stone, so how can the dharma be demonstrated? I fear heaven will change and the earth will be transformed, and then teachings of the Great Teacher will not be heard.
 Temple seen in this video at the 02:58 mark http://www.youtube.com/watch?v=-edsEf2mDxI
 Emperor Wu´s use of the term ‘Xuanlong (Black Dragon) ‘ in combination with the part of the sentence ‘within the blue sea’ , is interesting as the word in China also means ‘great king or Spirit dwelling in the depths of the mystic waters’ or a Dragon that dwells in deepest parts of a vast Sea or Mind, where no ordinary man has access to due to ignorance [of IT]. Hence the mystery.
Progeny´s of Bodhidharma´s true dharma and spiritual light of Mahayana, where thus known and referred to in ancient China as Black Dragons.
 The emperor supposedly had some later encounters with the Great Sage and was taught beginner dhyana, probably some basic prana exercises (breath exercises as to calm the monkey mind and allow the seed of bodhi bloom within him) which is reflected in the gratitude he expresses to his beloved teacher in the memorial stele.
 The spiritual light of Mahayana that is an awesome force, clearning beginningless kalpas of defilements, opening the way for true enlightenment/awakening. This light is also referred to as bodhi-citto-pada in sanskrit or Bodhi power in certain modern contemporary Mind Only schools.
 Among Tibetan Buddhists in the northern parts of India and even old Tibet, there are still a practise among Dzogchenist´s known as the rainbow body (Tibetan: Jalu or Jalus) or a body of light.
From the point of view of an external observer, the following happens: the corpse does not start to decompose, but starts to shrink until it disappears. Usually fingernails, toenails and hair are left behind. Usually a strong light or rainbow phenomenon is observed by those present or nearby by this conversion of matter into pure energy by means, aid and effectuation by the awesome power of Pure Mind.
The rainbow body phenomenon is usually accomplished by someone whom many times have ‘visited’ Satchidanandasagara (sanskrit: the indescribable Absolute Reality), and thus is firmly and irrevocably established in Jnana-nishtha (sanskrit: the knowledge of the self) thus having attained right knowledge (sanskrit: samma na.na, tibetan: Rigpa) and right emancipation (samma vimutti).
After this disposal of the material body (now converged into pure energy, hence the light),
His or her physical body self-liberates into a nonmaterial Sambhogakaya (sanskrit: body of light) with the ability to exist and abide wherever and whenever as pointed by one’s compassion.
Famous historical Sages whom are recorded to have done this are Jesus Christ , Bodhidharma, Vimalamitra, Plotinus and others. All, usually the mystics in their schools of Spirit/Mind Only.
 The emperor hints in this part of the text , that the Great Sage might already have been present before him in his Manomayakaya Body, and thus his ‘sitting’ in the cave for 9 years in this body, would explain the absence or intake of food or water for this entire period.
For one with a mind stuck to the skandhas, like flies are stuck to the sugarsweet and sticky surface of fly-paper , it is impossible to see a difference between a corporeal/material 3D like appearance and a manomayakaya-appearance. Only one not anymore fooled by sensory perception and well aquainted with the spiritual light of Mahayana, instantly reckognizes (and feels the awesome) presence of a Sage in his Manomayakaya-body (pure mind-body made out of pure Mind).