A CHARMING story has reached us concerning the softer side of that thrusting young executive Richard Li Tzar-kai. In the days before the Lis sold their majority stake in the STAR TV satellite service, Richard was on a business trip to India. As the Hong Kong group made their way from appointment to appointment they were assailed by scores of beggars, anxious for a few rupees. Time and time again their pleas were ignored, since it is impossible to give them all something and an equally impossible choice to work out who to favour. Finally, at one stop where a single beggar sat pathetically waiting for money, the group swept past as usual, only for Richard to decide enough was enough. Turning on his heels he strode towards the beggar, removed his wallet from his jacket and asked politely: ''Er . . . will US dollars do?''