Are there 7 days metro passes or senior discount metro passes for travellers in Chongqing

There is no seven-day metro pass, only one-day metro pass. There are discounted ticket types for seniors, but they are for chinese citizen only. If you will travel by metro a lot, you can buy the one-day pass, which will allow you to travel by metro unlimitedly within 24 hours; it costs CNY 18 per card.