中國交通建設

Don't worry. You may receive the certificate of share today or tomorrow. It's normal that it's a little bit late if you buy share in White form.

Normally, if you really lost the share, you can download this form to apply reissue.
https://www-uk.computershare.com/Content/download.asp?docId={9FAB99E4-C87C-4778-B8F7-B745120FC31D}&cc=HK&lang=en&bhjs=1&fla=1&theme=cpu

However, the cost involved may be over HK$10000, as it requires you to make advertisement in newspaper to declare you lost the share. Therefore, it's not wise to apply reissue if the amount involved is small.

Anyway, if you still can't receive, I suggest you to call 香港中央證券登記有限公司 Computershare Hong Kong Investor Services Limited 2862 8555 to know more detail, as you may argue that the reponsibility is on them.