Just give the Huawei a Static IP in the same range as the Dlink and switch off it's DHCP and point it to the D-Link instead.
Then it becomes an Access Point with no routing.
It is a very simple way. Unfortunately I saw reports that Huawei do not work well with other WiFi access points configured as WiFi extenders. It is a source of revenue, as they sell their own extenders which apparently work well.
For the clarity, please confirm if I understand properly this: "and point it to the D-Link instead". My only concern is that DHCP clients will not receive default gateway settings from Dlink, it must be configured manualy on each client. Alternatively Dlink (which do not do any routing), has an option to declare default gateway manually (Huawei IP address must be entered here). The same apply for distributing DNS settings.