Question

پس از آن مقدمات ورود به بورس کلید خواهد خورد

Answer 1

After that / Then, the preliminaries / the preliminary / initial steps for entering into the stock exchange (market) will be switched on / started / commenced.

After those preliminary steps , entering into the stock exchange (market) will be switched on.

Answer 2

After that issue the preparation of going into stock exchange will be started.