@bucko, well, you may find that it's not a good idea to drive to Lao in a Chinese car for the time being anyway because Chinese interests are being targeted by shadowy Hmong/Lao insurgents in Luang Prabang, Vientiane and Saisomboon provinces. Earlier this year, a Chinese SUV was shot at and two Chinese tourists inside killed. Just now a Chinese registered bus travelling from Kunming to Vientiane was shot at, injuring 6 and killing 1.
Chinese plates could make you a target anywhere south of Luang Prabang and north of Vang Vieng even if you're not Chinese yourself, but those blue plates with the one Chinese character stand out.
However, even if they are able to stop the shootings and bombings (yes there was also at least one bombing in Saisomboon) questions are being raised about all the Chinese cars entering Laos, particularly during peak periods like CNY.
Neighboring Thailand is putting a stop to them starting in the next few weeks by requiring advance permission through a Thai based travel agency or tour operator 10 business days before arrival, submission of travel itineraries, 3rd party insurance, a special plate that must be inside the vehicle at all times, traffic orientation for one hour and possibly a Thai temporary driver's licences for citizens of countries who don't possess a licence usable in Thailand(especially for Chinese who don't possess international drivers permits since China is not a signatory to the UN convention on international motor traffic). Apart from this, travel will be permitted only in the border province entered (for example Chiang Rai) with further travel permitted only with a Thai guide.
Convoys will require a guide and police escort, though it is unclear how many vehicles constitutes a convoy.
Motorhomes and motorcycles will be banned from Thai roads altogether, only cars and pickup trucks with no more than 9 seats and a GVM of max. 3500kg will be permitted to enter.
Although these rules will not apply in Laos, if Chinese vehicles keep entering Laos in ever increasing numbers the Lao may also impose some restrictions of their own, particularly since it's rather unfair that the Chinese don't allow Lao vehicles beyond Jinghong (except buses, which are permitted to travel up to Kunming), while the Chinese are allowed free reign to roam around Laos.