Here are four videos of "Namo Guan Shi Yin Pu Sa" recitation in Mandarin. I think the videos are really amazing. There are so many versions of the recitation of "Guan Yin Pu Sa" Name all over the internet. I just select some of them which I think commonly used in recitation. One of the videos is sung by Master Hai Tao, the founder of lifetv.org.tw.
Let's recite "Namo Guan Shi Yin Pu Sa" together and transfer the merit of this recitation for all of the sentient beings in the universe and for world peace.
觀世音菩薩的故事
南無觀世音菩薩 - 寺院版
南無觀世音菩薩聖號(梵唱)
南無大悲觀世音菩薩聖號