An RFID chip is modified with set data before being disposed in an electronic label so as to allow the electronic label to be selectively used with different types of RFID systems. The RFID chip includes a first data storage zone for storing first data set accessible by the first type of RFID system and the second type of RFID system; and a second data storage zone for storing second data set inaccessible by the first type of RFID system and the second type of RFID system. The second data set includes a modifiable code for indicating a type of the electronic label and with which of the first type of RFID system and the second type of RFID system the electronic label is to be used.