Example embodiments of the present disclosure relate to information transmission in random access. A method comprises selecting, one of a plurality of random access preambles that is received from a terminal device, the plurality of random access preambles being divided into a plurality of subsets of random access preambles; selecting at least one predefined sequence associated with the selected random access preamble based on a predetermined association between a plurality of predefined sequences and the plurality of subsets of random access preambles and based on a target resource unit to be used for transmission of control information and data information; modulating the control information with one of the at least one predefined sequence, the control information indicating configuration of the data information; and transmitting the selected random access preamble, the modulated control information, and the data information in a random access message to the network device.