【明報專訊】AT a hearing held by the US House Committee on Science, Space and Technology on 11th April, it was proposed that efforts should be made to prevent the theft of US research and development achievements by Chinese students. Back in February, FBI director Wray talked about intelligence risks posed by Chinese students. President Trump also pondered whether to impose restrictions on student visas for Chinese nationals when he raised tariffs on imported aluminium and steel from China last month. All this has clearly shown that the US intends to use student visas for Chinese as a gaming chip in its rivalry with China. However, admitting fewer Chinese students to the US may not necessarily slow down the expansion of China's pool of talent. Rather, it may affect cultural exchanges between the two countries in the long run.