US-China trade tariff de-escalation: why, when, how, by how much?

With trade tariffs well above 100%, most trade between China and the US is no longer economically viable. At first glance, China has much more to lose, but its capacity to withstand the shock could last longer. There is less pressure from the private sector. For a month, neither side made the slightest overture. Discussions will begin tomorrow in Switzerland, neutral ground if ever there was one. The mutual interest is to reduce tariffs sharply so that a comprehensive agreement can be reached. The US is not going to give China the tariff it has set for the rest of the world (10%), or even probably the one at the end of 2024 (20%). Any other option remains prohibitively expensive for trade.