In fact, Bhutan's visa is not difficult to obtain, but it cannot be applied by tourist herself/himself. It can only be gotten through the Bhutanese travel agency authorized by the Bhutanese government.
Because Bhutan does not have diplomatic relations with China (Bhutan only has diplomatic relations with 22 countries, mainly with South Asian countries), it can not apply for Bhutan visa in China. If you decide to travel to Bhutan within one to two weeks, the travel agency can help you get a visa, and you don't need neither proof of property, work nor bank flow.
Most Frequently Asked Questions About Bhutan Tours FAQ