** Shares of China's Dongyue Group 0189.HK jump as much as
19.7% to HK$6.39, their highest since Sept. 13
** Stock on track for biggest one-day pct rise since July
2021; biggest pct gainer in Hong Kong's material index .HSCIM
and Hang Seng Composite Index .HSCI
** Chemical engineering group says plans to buy back 520.98
mln shares or 23.12% of the issued share capital, for 3.46 bln
yuan ($473.84 mln) urn:newsml:reuters.com:*:nFWN3BT182
** Co says it plans to buy back shares at HK$7.10 apiece,
representing 32.9% premium to the previous close of HK$5.34
** Co also plans to sell units stakes to major shareholder
for 3.46 bln yuan; proceeds to replenish cash used in buyback
** Hong Kong's material index .HSCIM gains 0.5%, while
Hang Seng Composite Index .HSCI slips 0.6%, Hang Seng Index
.HSI down 0.7%
** Stock down 27.1% YTD
($1 = 7.3020 Chinese yuan renminbi)
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))