rtokens: It gave no further details of the venture .
pos: DT NN MD VB JJ NN IN CD NNS , DT NN VBD .
tokens: The plant will have annual production of 400,000 tonnes , the newspaper said .
ltokens: The Dow Chemical Co of the United States will invest $ 4 billion to build an ethylene plant in Tianjin city in northern China , the China Daily said on Saturday .