Anybody can enlighten me is there different between bai tian gong and buddhist

And is si mian fo and guan yin part of buddhist or lump together with bai tian gong

The Four-Face 'Buddha' is actually the Hindu god Brahma.

Taiwanese talk shows are loaded with bullshit, and Taoist masters are largely frauds.

Taoists do not believe in heaven, hell or reincarnation.

Their deities correspond to forces of nature or stars in the sky.

Tian Gong is a Chinese folk religion practice, yes.

Brahma is Creator god in Hinduism.

In Buddhism, Brahmas are used as a collective term to refer to beings who are in the Fine Material planes and Immaterial Planes.  Those realms can only be accessed by people who have cultivated Jhanas (mental absorption) , and maintaining at their dying moment.

Brahmas are usually depicted as four face being in statues. The reason is the Brahmas, have one thing in common - which is the purity of the mind, their mind is always dwelling in the following qualities, also known as "station of the brahmas", or "station of the high divinity"

Metta - loving kindness
Karuna - compassion
Mudita - sympathetic joy
Upekha - equanimity

Internally generated happiness from the power of the mind, these beings are very peaceful lot. They don't have sex (no sex organ in their body form), no sense of touch/taste/ smell. Only have seeing and hearing faculties. And they live very very very long, in terms of World cycles (Aeons) !!

That's not Taoism.

Mao Shan has as much to do with Taoism as the Ku Klux Klan has to do with Christianity.

Anything outside of the Dao De Jing really shouldn't be considered Taoism.

This one , you really have to do some reading and homework , regarding the historical development of buddhism, and have to take into consideration some locality variation/ evolution.

As far as Theravada is concerned, the Pali Canon directly recorded what our historical Buddha taught. His daily routine, alms round, dhamma talks to kings/queens/noblemen/workers.  It also recorded the events preceding his parinibbana and his final instructions to his disciples. and also what happened immediately after his passing away, his funeral , distribution of relics, etc

so have you tried practicing any of it?

just find a center you feel comfortable..nearby your place and join them...

practice and understanding goes hand in hand.

moderation.....middle path