I don't think it was vague, the executive order stated:
> The following actions shall be prohibited beginning 45 days after the date of this order, to the extent permitted under applicable law: any transaction that is related to WeChat by any person, or with respect to any property, subject to the jurisdiction of the United States, with Tencent Holdings Ltd. (a.k.a. Téngxùn Kònggǔ Yǒuxiàn Gōngsī), Shenzhen, China, or any subsidiary of that entity, as identified by the Secretary of Commerce (Secretary) under section 1(c) of this order.
> The following actions shall be prohibited beginning 45 days after the date of this order, to the extent permitted under applicable law: any transaction that is related to WeChat by any person, or with respect to any property, subject to the jurisdiction of the United States, with Tencent Holdings Ltd. (a.k.a. Téngxùn Kònggǔ Yǒuxiàn Gōngsī), Shenzhen, China, or any subsidiary of that entity, as identified by the Secretary of Commerce (Secretary) under section 1(c) of this order.