How could we get an investors for a magazine business?

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How could we get an investors or business partners for the magazine business that we could totally trust and we will know that person is credible enough to be our business partner? Because my friend is in need of business partners or investors for his magazine business however he can't find someone that is totally credible and the one he could trust. We already tried some forums but then no one approaches us yet regarding the business. Other than that his last option are Koreans but he has second thoughts about it since there is something strange about them. I just told him not to get it because even my brother told me so not to trust them. Is there any other ways that we could get investors?