Is an accountant who works for a contracting company that builds entertainment malls and administrative offices and leases their units for various activities sinful if he knows of the existence of restaurants that serve alcohol in one of the company's old malls, or if the new mall for which he oversees the accounts is planned to include a cinema complex and a hotel?

There is no harm in working as an accountant in a contracting company that will build a mall, as long as the accountant's work is not related to allocating parts of the mall for unlawful activities. The mall itself is not unlawful, and the presence of unlawful things or unlawful services within it does not affect the मूल contract or prevent working in its construction, as long as the work does not involve direct engagement in the unlawful or direct assistance in it.