Where does 'entertaining' (paying for lunches), trips to factories (with accommodation), 'holidays' (visits to see products in service), gifts (pens, folders, bottles or greater) slide into cash donations (discounts and commission on sales)?
I suppose it's all relative.
Bribery is the act of giving money, goods or other forms of recompense to a recipient in exchange for an alteration of their behavior (to the benefit/interest of the giver) that the recipient would otherwise not alter. Bribery is defined by Black's Law Dictionary as the offering, giving, receiving, or soliciting of any item of value to influence the actions of an official or other person in charge of a public or legal duty.
Gifts of money or other items of value which are otherwise available to everyone on an equivalent basis, and not for dishonest purposes, is not bribery. Offering a discount or a refund to all purchasers is a legal rebate and is not bribery.
It may be money, goods, rights in action, property, preferment, privilege, emolument, objects of value, advantage, or merely a promise to induce or influence the action, vote, or influence of a person in an official or public capacity.
One must be careful of differing social and cultural norms when examining bribery.
Expectations of when a monetary transaction is appropriate can differ from place to place.