Arkhom said the MoC was initially scheduled to be inked by representatives of the two governments during a meeting of the ninth joint Sino-Thai committee on the railway project at the Oriental Hotel on Thursday.
But Deputy Prime Minister Somkid Jatusripitak ordered the Thai representatives to postpone the signing of the MoC after China appeared that it would not fully honour the initial agreement to buy rubber sheets from Thailand, Arkkhom said.
He said China has informed the Thai side that it would change the company that would buy the rubber and the firm would buy only new sheets in the market, not the old ones in the government stockpile as initially agreed.
Arkhom said the signing of the MoC of the railway project would be postponed until the two sides reach an agreement on the rubber buying and selling.