China and Hong Kong shares climb, Mengniu up after Danone's deal
* HSI +0.9 pct, H-shares +1.1 pct, CSI300 +1.1
* Hong Kong indexes head for best month since July
* Steel stocks up after China says to support railway industry
* Mengniu rises after Danone's investment in Yashili
HONG KONG, Oct 31 (Reuters) - Shares in Hong Kong and mainland China markets rose on Friday, helped by strength in most heavyweight stocks as investors bet that China's government will roll out more support measures for the economy.
The Shanghai Composite Index rose 0.9 percent to a 20-month high of 2,412.5 points by midday, while the CSI300 of the leading Shanghai and Shenzhen A-share listings climbed 1.1 percent.
For the week, the mainland indexes looked set to gain 4.8 percent and 4.4 percent, respectively. For the month, the indexes were up 2.1 percent and 1.8 percent, respectively.
"Gains by heavyweight stocks helped the main index to climb above 2,400 points - a technically-important level," said Tian Weidong, head of research in Kaiyuan Securities in Xi'an.
"The logic behind their gains is that they are betting on more easing policy from the government to come in the medium to long-term." Continuación...