（b）Managers, executives and specialists defined as senior employees of a corporation of WTO Members, being engaged in the foreign invested enterprises in the territory of the People's Republic of China for conducting business, shall be granted a long-term stay permit as stipulated in the terms of contracts concerned or an initial stay of three years, whichever is shorter;（c） Service salespersons-persons not based in the territory of the People's Republic of China and receiving no remuneration from a source located within China, and who are engaged in activities related to representing a service supplier for the purpose of negotiation for the sale of services of that supplier where:（a）such sales are not directly made to the general public and （b） the salesperson is not engaged in supplying the service: entry for salespersons is limited to a 90-day period.