Please help me correct it, thank you!

Autonomous vehicle technology does not only become [a/the] hot topic, but also the technology landscape for many manufacturers to spend lots of money into research and development. The senior vice president of BMW (China) service co-doctor Weirui recent remarks that for the development of the technique in China:” I believe that China is absolutely the first country to use autonomous vehicle technology, and it will be the world's biggest market in [a/the] self-driving car.” At present, BMW has tested autonomous vehicle technology in China, and the test car which is being adopted is the new BMW 3-Series Extended Wheelbase specifically aimed at the Chinese market. It isn't difficult to predict that after the text, the new BMW 3-Series wich equipped with the autonomous vehicle technology will hopefully just [be aimed/aim] at [a/the Chinese market.

please help me correct it, thank you!

Autonomous vehicle technology is not only becomes becoming a hot topic,but also the technology landscape for many manufacturers to spend lots a lot of their money into research and development. The senior vice president of BMW (China) service co doctor director Weirui's recent remarks that for the development of the technique in China:” I believe that China is absolutely the first country to use autonomous vehicle technology, and it will be the world's biggest market in self-driving cars.” At present, BMW has tested autonomous vehicle technology in China, and the test car which is being adopted is the new BMW 3-Series Extended Wheelbase specifically aimed at the Chinese market. It isn't difficult to predict that after the text test, the new BMW 3-Series, wich is equipped with the autonomous vehicle technology, will hopfully just be aimed at Chinese market.

:-)

please help me correct it, thank you!

Autonomous vehicle technology is not only becomes not only a hot topic,but also the technology landscape for that many manufacturers to spend lots of money into researching and developing development. The senior vice president of BMW (China) service co-director Weirui recently remarked that for the development of the technique in China:” I believe that China is absolutely the first country to use autonomous vehicle technology, and it will be the world's biggest market in self-driving car.” At present, BMW has tested autonomous vehicle technology in China, and the test car which that is being adopted is the new BMW 3-Series Extended Wheelbase specifically aimed aiming at the Chinese market. It isn't difficult to predict that after the text, the new BMW 3-Series (which wil be) equipped with the autonomous vehicle technology will hopefully just aimed at the Chinese market.

The structures that follow "not only... but also..." should be parallel, that is, noun versus noun. This is a better writing style.

A long phrase that modifies a noun should be replaced with a relative clause like the last half of the first sentence.

Use "that" instead of "which" if it is a restrictive relative clause.  

This is some rules I learned from The Element of Style. Hope it helps.