Dear Rauf_ffc,
you are asking about the yellow Engine light. well it switches off once you give the ignition to the engine its normal.
sometimes when CNG pressure isnt accurate you may get it while driving which is also normal.
anyways accept my congratulations for you new buy.
For your information, you may change its head lamps to crystal lights (option available in market) or install fog lights (chinease version or original) to increase the lighting effect on road.