CYD [CHINA YUCHAI INTERNATIONAL] SC 13D/A: CUSIP No. G210821050 Page 2 of 12 1
[CUSIP No. G210821050 Page 2 of 12 1 NAMES OF REPORTING PERSONS Well Summit Investments Limited (Well Summit) 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS) ¨ ¨ (a) 3 SEC USE ONLY 4 SOURCE OF FUNDS (SEE INSTRUCTIONS) AF 5 ¨ 6]