回複：隔了兩個月，想再去加拿大簽證.

是不是太頻繁了會遭到拒簽？

no problem.
太頻繁了 because there was no visa reciprocal agreement between PRC and USA. So, US citizens can only get the short-term visa to go to China and PRC citizens (excluding HK, TW) receive the same.